To respond to the ending of this piece, I think open source still matters because LLMs generate very specific code for a specific situation. Quality libraries mean solutions can be reliably shared between projects.

But how do you tell quality libraries from LLM generated ones? How do you even discover up quality libraries if you are leaving so many code decisions to LLMs? Once the LLMs train on your quality libraries how do you stop so many copies just getting pasted into people's code without your attribution and without directing people back to your library (and your very human interests in funding development on it or getting copyleft contributions back to it)?

I think there are so many hard questions right now for "Does open source even matter any more?" and many of those questions seem particularly demotivating to me right now, especially because we don't seem to be at risk of getting some, much less better, answers any time soon.