Why didn't Star Trek ever tackle the big issues, like them constantly updating the LCARS interface every few episodes to make it better, or having Geordi La Forge re-writing the warp core controllers in Rust?

Because, something that a lot of tech-obsessed Trek fans never seem to really come to terms with, is that Trek didn't fetishize technology.

In the Trek universe, LCARS wasn't getting continuous UI updates because they would have advanced, culturally, to a point where they recognized that continuous UI updates are frustrating for users. They would have invested the time and research effort required to better understand the right kind of interface for the given devices, and then... just built that. And, sure, it probably would get updates from time to time, but nothing like the way we do things now.

Because the way we do things now is immature. It's driven often by individual developers' needs to leave their fingerprints on something, to be able to say, "this project is now MY project", to be able to use it as a portfolio item that helps them get a bigger paycheck in the future.

Likewise, Geordi was regularly shown to be making constant improvements to the ship's systems. If I remember right, some of his designs were picked up by Starfleet and integrated into other ships. He took risks, too, like experimental propulsion upgrades. But, each time, it was an upgrade in service of better meeting some present or future mission objective. Geordi might have rewritten some software modules in whatever counted as a "language" in that universe at some point, but if he had done so, he would have done extensive testing and tried very hard to do it in a way that wouldn't've disrupted ship operations, and he would only do so if it gained some kind of improvement that directly impacted the success or safety of the whole ship.

Really cool technology is a key component of the Trek universe, but Trek isn't about technology. It's about people. Technology is just a thing that's in the background, and, sometimes, becomes a part of the story -- when it impacts some people in the story.

I have often thought that Star Trek is supposed to show a future in which computer technology and user interfaces have evolved to a steady state that don't need to change that much, and which is superior to our own in ways that we don't yet understand. And because it hasn't been invented yet, the show does not invent it either.

It is for the audience to imagine that those printed transparencies back-lit with light bulbs behind coloured gel are the most intuitive, easy to use, precise user interfaces that the actors pretend that they are.

Because the LCARS GUI is only for simple recurring tasks, so it's easy to find an optimal interface.

Complex tasks are done vibe coding style, like La Forge vibe video editing a recording to find an alien: https://www.youtube.com/watch?v=4Faiu360W7Q

I do wonder if conversational interfaces will put an end to our GUI churn eventually...

Trek needs to visibly "sci-fi-up" extant tech in order to have the poetic narrative license to tell its present-day parables.

Things just need to "look futuristic". The don't actually need to have practical function outside whatever narrative constraints are imposed in order to provide pace and tension to the story.

I forget who said it first, but "Warp is really the speed of plot".

Mostly i believe its that the writers envisioned and were able to wrldbuildinsucha way that the tech was not a subject but was rather a part of the scenery/background with the main object being the people and their relationships. Additionally in some cases where alien tech was interfaced with the characters inthe storysome UI/code rewites were written in, for example in DS9 where the Cardassian interfaces/AI are frustrating to Chief O'Brien and his efforts to remedy/upgrade such gets a recurring role in the story.

Conversly recent versions have taken the view of foregrounding tech aidied with flashy CGI to handwave through a lot.Basically using it as a plot device when the writing is weak.

Man, I should hope that the warp core controllers on the USS Enterprise were not written in C.

On the other hand, if the writers of Star Trek The Next Generation were writing the show now, rather than 35-40 years ago - and therefore had a more expansive understanding of computer technology and were writing for an audience that could be relied upon to understand computers better than was actually the case - maybe there would've been more episodes involving dealing with the details of Future Sci-Fi Computer Systems in ways a programmer today might find recognizable.

Heck, maybe this is in fact the case for the recently-written episodes of Star Trek coming out in the past few years (that seem to be much less popular than TNG, probably because the entire media environment around broadcast television has changed drastically since TNG was made). Someone who writes for television today is more likely to have had the experience of taking a Python class in middle school than anyone writing for television decades ago (before Python existed), and maybe something of that experience might make it into an episode of television sci-fi.

As an additional point, my recollection is that the LCARS interface did in fact look slightly different over time - in early TNG seasons it was more orange-y, and in later seasons/Voyager/the TNG movies it generally had more of a purple tinge. Maybe we can attribute this in-universe to a Federation-wide UX redesign (imagine throwing in a scene where Barclay and La Forge are walking down a corridor having a friendly argument about whether the new redesign is better or worse immediately before a Red Alert that starts the main plot of the episode!). From a television production standpoint, we can attribute this to things like "the set designers were actually trying to suggest the passage of time and technology changing in the context of the show", or "the set designers wanted to have fun making a new thing" or "over the period of time that the 80s/90s incarnations of Star Trek were being made, television VFX technology itself was advancing rapidly and people wanted to try out new things that were not previously possible" - all of which have implications for real-world technology as well as fake television sci-fi technology.

Because it’s a fantasy space opera show that has nothing to do with reality