Again, a computer isn't a chip with nothing else.

In the ARM world, that other part you are completely ignoring isn't standardised, even with device trees, they only help to alleviate the pain that each computer is its own OEM snowflake.

The comment you're replying to is implying that in an ARM world nothing is standard, portable, or compatible by default. Think about smartphones: Every single one a bespoke board with bespoke hardware.

In ARMland, there's no such thing as standard OS images you can install on any machine, or generic components that users can buy and install themselves.

I know I will never switch to ARM willingly. There is no advantage, only vendor lock-in. I feel that x86's openness was an accident, and we should try to keep x86 alive as long as possible.