Comment by SlowTao

In a way I am not too worried about the ISA, but having a set boot system that you can target the system with. This is where x86 still wins and ARM have dropped the ball. You can boot something like FreeDOS on an 8086 or the latest i9 with the exact same code base thanks to BIOS compatibility. But with ARM you are looking at hundreds of different targets.

The issue with ARM looks to be creeping into Risc V because anyone can make an additional processor entirely to their own target. For better or worse.

A standard boot target is much more useful to the end user than an open chip behind yet another boot standard. That I am praising the mediocre and closed x86 for this is a little showing of how bad the situation can be.