UI Degrades over Time
grumpy.website
grumpy.website
Software doesn’t need continual redesign and redevelopment at constant scale, nor is there unlimited need for new software tools in any one company’s wheelhouse, but the expectation is that software companies hire people and keep them onboard as long as they’re performing well, not that they’ll scale up for a periodic launch and then scale down again. And a company that did that — outside of the video game industry — would be shunned by developers (at least in a good labor market).
I think that's exactly why they do it: "Our division has 600 developers that we're paying large amounts of wages to, if we try and fix some bugs no-one notices but if we roll out the 357th UI refresh everyone notices. OK, UI refresh it is then".
There were credentialed academics running studies and contributing to the UI/UX design in KDE in the 2000s at least, though I guess your comment is true in the sense that (most) commercial software usually does design by middle management.