ARM has THREE instruction sets. (four?) aarch32, aarch64, and various incarnations of Thumb. (A PI 5 supports all three).
fluoridation
Okay? x86-64 has like twenty extensions. What's your point?
rerdaviesOP
The point was that, with respect to the effects of implementing multiple decode stages for multiple instruction sets, ARM doesn't have an advantage over x86 in that respect.
(M1 does, because they don't implement aarch32, or thumb).