It isn't clear at all that bundling security and UI updates is the way things are going. That may be true if you look at very narrow parts of the market, but for example all of our servers and pretty much every piece of software we run on them get separate, individually installable security updates that very deliberately don't change any other functionality (and with extremely high reliability, don't break anything in the process either).

But the adoption rates for Windows 10 show that it's acceptable to the vast majority of people.

That's still a stretch. Nearly two years after release, even with very aggressive promotion including literally giving it away to home users for one of those years, it looks like Windows 10 still has far less market share than Windows 7. I don't know see you can get to "vast majority of people" from there.

As for businesses, large enterprises may be moving towards 10, though I note that the citations you gave earlier were invariably future predictions by analysts rather than actual adoption numbers. However, as I keep saying, large enterprises are getting a version that is very different, because it doesn't suffer from problems like having mandatory updates (or telemetry etc.) that have been widely criticised in other editions.

In contrast, and in complete opposition to your earlier claim that most organisations are moving to Windows 10, I mostly work with smaller tech businesses, where approximately none are currently moving to Windows 10 as their standard platform and several are actively looking into alternatives. If that experience is even remotely representative of the wider customer base, the nerfing of the Pro edition is going to hurt Microsoft if they don't fix it before the 2020 deadline. These companies don't have "IT departments" and they don't want "enterprise licensing deals". They want to buy new PCs that they can use to do their work, and for the less technical businesses, they usually want those PCs to be something Bob from Customer Support can set up because he knows a bit about how the office network works and has a list of which software they usually install for new starters. Getting away from all the other hassle is a big part of why cloud-based services are so popular.