At the same time, efforts to diversify into other areas have not been, to put it charitably, as successful as they would have liked.
I'll agree that they're still critical and relevant, but at the same time, they're the least critical and most irrelevant than any other time in the history of the PC.
‘My name is Ozymandias, king of kings:
Look on my works, ye Mighty, and despair!'
Because for some strange reason, humans need to believe that what is, is always how it will be.
Microsoft is on most business computers (with some very notable and important exceptions) so Microsoft will always be number one, world without end, amen.
But that isn't how it works, no matter how much some of us demand stasis.
I don't have a dog in this pissing contest, as I use and enjoy OSX (now MacOS) Linux, iOS, Android, ChromeOS and Windows. I mainly enjoy pointing out that the belief that because it was Microsoft uber alles, that it shall be Microsoft uber alles, forever. Even the National Football League, once considered firmly cemented as the king of sports forever, is doing a bit of a decline. Trying to look at it with a non-prejudiced eye - with a disclaimer that my least favorite OS is Windows, if I google "Microsoft moving to subscription OS", we get a lot of NO THEY ARE NOT! and a couple announcements that say "oh, we are", as Enterprise and Surface serve as the test bed.
IOW, the faithful will in the not too distant future will be able to prove their loyalty with their wallets, forever and ever, world without end, amen. We'll see how that works out. It won't take all that long until you have paid much more for your Windows machine than that stupid hipster and his "overpriced" Mac.