FWIW, this just isn't true for KDE. We hit a rough patch with the KDE 4.x series - 17 years ago - that has been difficult to live down, but have done much in the way of making amends since, including learning from and avoiding the mistakes we made back then.

For example, we intentionally optimized Plasma 5 for low-powered devices (we used to have stacks of the Pinebook at dev sprints, essentially a RaspPi-class board in a laptop shell), shedding more than half the menory and compute requirements in just that generational advance.

We also have a good half-decade of QA focus behind us, including community-elected goals like a consistency campaign, much like what you asked for.

I'm confident Plasma 5 and 6 have iteratively gotten better on all four points.

It's certainly not perfect yet, and we have many areas to still improve about the product, some of them greatly. But we're certainly not enshittifying, and the momentum remains very high. Nearly all modern, popular new distros default to KDE (e.g. Bazzite, CachyOS, Asahi, Valve SteamOS) and our donation totals from low-paying individual donors - a decent proxy for user satisfaction - have multiplied. I've been around the commnunity for about 20 to 25 years and it's never been a more vibrant project than today.

Re the fantastic talk, thanks for the little KDE shout-out in the first two minutes!