ARM for the desktop is in a weird situation. Apple pulled it off because they control the whole stack, obviously. But PCs are another question entirely.
Wintel got where it is because the IBM 5150 shipped with it, and “PC Compatibles” grew out of there. Essentially both Intel and Windows piggybacked off the reach of IBM.
From there, MS used many tactics (some arguably illegal) to grab 90% of the market, solidifying Windows on x86 as the dominant player. Intel also became extremely successful and outpaced AIM’s Power architecture, and that’s when Apple switched.
In the current market, I’m not sure how ARM gets its foot in the door. There has to be a profit motive and a player big enough with the technical prowess to take on the x86 players and convince Microsoft to take Windows on ARM seriously. NVidia comes to mind, and iirc AMD said they’ve restarted their ARM development.
But it’s not gonna be useful without compatibility, and they need Microsoft to do that. Linux already has ARM covered, but unfortunately most people are comfortable with Windows.