[pjmlp]

A mix of too many cooks, I would guess.

The Windows 10 file explorer architecture traces back to the XP one, with several COM extension points, and it got some re-architecture on post vista as they doubled down on using COM for what were originally .NET based ideas for Longhorn.

For example the File/Open common dialog became COM based as well.

On Windows 11, from what I have read they did a full WinUI 3.0 reboot (the migration of UWP COM on top of Win32), losing half of the features in the process.

So far I still consider Windows 11 as the next Vista/Windows 8, and am as eager to update as on those versions.