Look at the trajectory for ARM catching up with Intel. The trajectory for RISC-V is even faster. That’s at least mildly indicative of where the future is headed.
The first 4 minute mile record was set in 1954. Now there are a bunch of people who have done it. Once formerly new techniques start to be known and distributed, it becomes much easier to catch up.
Remember, RISC-V doesn't have to beat ARM -- only come close enough that the price differential outweighs the performance difference. This is already happening on the low-end end and it's only a matter of time (IMHO) before this becomes reality on the high-end too.
