The transition to RISC-V depends entirely on how much of the cpu core susbstem is from ARM. The ISA itself is one part, there are branch predictors, l1,l2 and 3

The transition to RISC-V depends entirely on how much of the cpu core susbstem is from ARM. The ISA itself is one part, there are branch predictors, l1,l2 and 3 caches, MMUs, virtualization, vector extensions, the pipeline architecture, etc etc. So moving away from ARM means they need performant replacements for all that. I'm sure there are folks like SiFive that have much of this, but how is it competitively I don't know, and how the next snapdragon would compete if even one of those areas is lacking... Interesting times.