This is maybe just that I switched to Linux years ago and haven't touched Apple hardware much, but what strikes me is how little the OS matters anymore. So much of the tooling is cross-platform now, so many of the applications are web based, and so much of the native platform can know be emulated, that part of why the market share isn't guaranteed is a level of portability that didn't exist a decade or two ago.

Everything from Edge as a cross-platform Chrome derivative to .NET as a cross-platform open-source toolkit to their React Native builds and experiments with Android suggest that MS itself understands this. The Linux side demonstrates it with things like Proton and the forthcoming Android desktop mode. The Web demonstrates it in general as it expands in capability and more applications skip shipping native entirely in favor of technologies like Electron. And not that I don't personally sob in system RAM, or have extreme reservations about how we got these things (see: Google and antitrust), but I can't say I hate the ease of switchover.

Ecosystem lock-in didn't go away, but it feels like it's changed a lot.