They seem to have forgotten why some of their most popular applications became most popular in their respective categories, and that wasn't just leveraging their OS marketshare OEM install dominance. It was a combination of reasonably good UI design that had a degree of intuitiveness along with fairly easy access to more advanced features, with an added dash of the ability to use data from one application in another without major headaches. Arguably MS Office in the days before Ribbon and Metro UIs exemplify this.
Unfortunately they chose to change the UI for change's sake, ie, because users wouldn't recognize that they now had a shiny new version of the product if they didn't flagrantly change the UI, and they chose UI designs that frankly sucked. They also seem to have harmed that interoperability by trying to push too much of it when it doesn't fully work right.
Obviously there have been software companies that had products that for the professionals constantly using them were better, like WordPerfect to Word, but those didn't generally work well for both the power user and the casual user. Originally Microsoft had managed to bridge that gap. But Ribbon and Metro interfaces have harmed the power user, it's now harder to do things than it should be, and power users have incentive to look for software that gives them the features without the bloat.
I doubt that Microsoft is going to understand this in this revamp. They're going to try to cram some UI change solely for the purpose of making it different than the prior version, and even if it's now "native" it's still going to suck. And they're going to try to force any remaining users on prior versions of Windows off of those and onto Windows 11.
