This is not how ISA, fab nodes, or hardware design work at all. ARM is not special. It was just a company that made it easier to put together a bunch of processor blocks and peripherals for a fee and royalty. It was just a convince thing for the trailing edge. Everything ARM can do RISC-V can do as far as ISA. No one is going to pay a royalty when the same thing is free. This is the realm of big money where the choice is obvious. Not to mention, we are on the final node already when it comes to scaling, the progress of the last 40 years has stopped. There is potential in new technologies like computing with light, but silicon lithography will never drop below 3-5 nanometers because that is the end of what physics allows with quantum tunneling effects. We will eventually move past the stone age of computing with silicon. Organic technology is the holy grail, but until a major shift is made, we are at the end of silicon progress despite what all the marketing fools hype and moan about. ARM has no where to go. The people that created it bailed ages ago because the writing was on the wall all the way back then.