Unless a UI is completely broken, or you want the user to do something completely different, there is no reason to make large changes. You can continue making i

Unless a UI is completely broken, or you want the user to do something completely different, there is no reason to make large changes. You can continue making incremental improvements for years, just look at macos. Windows 7 taskbar was great. Windows 10 added a few improvements. Windows 11 restarted from scratch for no reason whatsoever. I think they only way this happens is if nobody in the entire org has a cohesive vision for the product. It's every man for himself. Somebody wanted to implement a new taskbar from scratch, and they had enough pull within the company. So they got to do it. Users and product be dammed.