One thing people are not taking into account is that many developers now have less time and are working a lot more because AI makes it seem it should be possible to hit those deadlines, etc.
Also, many programers have spent their entire funds on tokens, so neither are left with extra money nor time.
Acquisitions change priorities and layoffs put the squeeze on people. AI is for sure in the mix there, but open source decay is a result of no room in budgets for anything but maximizing revenue.