Re: How many companies have to fail at server-side ARM64 ...
You may as well apply your last sentence to yourself, as it looks like you forgot some lesson from history.
That is:
x86 is born as a desktop CPU rather than a server one.
Regarding difference between desktop and server CPU, I already eared that: This is what company sending servers with their own CPUs said to the world when they started to feel the hot from (comparatively) cheap x86 server lines.
BTW, yes, there is a difference between desktop and server CPUs, but the instruction set is moot for that purpose.