The issue is that the barrier of entry for a new company taking Apple's space is too big.

Apple is the only company that controls both the hardware and the software. It's absolutely impossible to compete with them on UX for regular users. A completely new paradigm of computing would have to be created and popularized.

You can't compare macOS with Windows or Linux. These are entirely different games they are playing.

I'm a power user, I would say. I have a Windows workstation at home just because I need to use 2 apps for 3D printing that only exist on Windows.

I have a Raspberry Pi 5 with 2 displays plugged in for monitoring my systems.

I have a Ubuntu server at OVH.

And 2 MacBooks that I use for everything else (running my business). My primary reason is that there are about 10 apps crucial to my business, and they do not exist on other platforms, such as Vellum for book publishing. Yes, there are alternatives on other platforms, but nothing comes close to the simplicity and speed of work we can achieve using that app. And this is, unfortunately, consistent among many niche apps.