I disagree, I think companies mostly just don't want to spend development money on existing "finished" products. That's the smell I'm getting from microsoft.

There are plenty of easily identifiable issues with performance in windows 11. There should be people in the windows team dedicated to eliminating "jank". MS product owners, on the other hand, are much more interested in getting copilot integrations into every menu. That's an "easy" task which looks good on a scorecard when you complete it.