Windows 11 has 1 Billion+ installs. That's not a decline and hardly a crisis. That's a huge install base.
This.
Ofc a huge chunk of that is in companies but I'm fairly sure there are at least two windows 11 machines per one mac in consumer segment as well.
There's an anecdote about flies and shit there somewhere =)
While that's true, I also think these things tend to happen as a gradual build up to the tipping-point effect where the zeitgeist shifts so suddenly that a massive player is suddenly irrelevant.
Microsoft is structurally incapable of making Windows better. Intel is intrinsically incapable of making x86 better (enough to matter). x86 hardware manufacturers are in a price race to the bottom, and there's no way around that.
Apple doesn't have any of those problems. Instead, more and more young people can afford and aspire to get a Mac. They want to buy software that works on the mac, and they'll want to write software for the Mac. The network effect compounds.