A lot of things get "stuck" and for good reason. Steering wheel, gas, and brake. Sight, trigger, stock. Underwear, pants, socks, etc.
Personally, I think the NT team really nailed the concept of the desktop back in 1993 with 3.1. The start button which hid programs and allowed access to other functions was incredibly handy, a bit like how a desk has a desk drawer within reach at all times. The desktop as a dumping ground for whatever you choose and system tray for misc stuff really, really works well and with mimimal cruft. Windows applications worked unlike MacOS applications by integrating the menu bar directly into the application itself instead of making it a detached accessory of the OS. Right-click support also allowed a lot of dynamic functionality.
I understand that almost none of these specific were their innovations, but they took a lot of half-cooked ideas and made something very, very usable.
Its a shame the NT team is never brought up like the Amiga or MacOS teams. I don't think they've gotten their proper due. Its also interesting that MS ran back to the start button/menu only three years after letting it go. Its incredible how powerful the NT way of doing things still is.