ARM is not something new, its over 25 years old.
I agree with you, I've actually got a "PC" or similar, from or approaching that time, with a fairly early Arm processor.
But those early processors, are quite a different story (but similar as well), from the "modern" Arm processors, because the company had lots of changes over the years.
And ARM never went anywhere outside its segments.
True.
They were hoping to move into 'new' PC desktop sales, when Windows 8 (Arm version) came out, but that has probably not turned out too well (my own opinion).
And money got everything to do with it. Without money you cant do anything.
Money has got lots to do with it, if you don't believe me, give me all your money as an experiment, and we can see if it makes any difference.
But the thing is, although Intel is doing well (money-wise) today, things may be completely different in 2, 5, or 10 years time.
If I had a magical time machine, and time-jumped to 2023, right next to a computer shop, rushed into the store, and bought a computer, what processor would be at the heart of it ?
Intel (Possibly), Arm based (Possibly), AMD (possible, but not the 1st choice that comes to mind), something else (maybe, but not necessarily likely).
I'm actually torn between Intel and Arm, because some signs say Intel are going to win, and others say Arm, so I'm really not sure.
Arm is sort of climbing up from the bottom, and Intel is sort of reaching down from the top, because Arm holds much of the bottom end of the market (hand held devices, embedded etc), and Intel (and to an extent AMD) holds the top, with PC's and the server market.
In the middle ground, all of Intel, AMD and Arm have their sales successes.
So, I really DON'T know, who will win out.