Powertoys and fancyzones in particular has been amazing with the proliferation of large monitors. Saves so much time and effort to configure windows. Don’t understand why it is an optional utility and not built into the OS.

I’d guess that major UI revisions are a big reason for average users. People don’t like having to relearn how to do something or find a setting. If M$ implemented a legacy UI setting that by and large mimicked the interface and controls in W10 they’d clear a major hurdle preventing less technologically inclined users from upgrading.