No, it wouldn't mean recompiling for every CPU revision. Today's CPUs contains a kind of JIT compiler implemented in hardware. There is no reason why this JIT

No, it wouldn't mean recompiling for every CPU revision. Today's CPUs contains a kind of JIT compiler implemented in hardware. There is no reason why this JIT compiler couldn't be implemented in Software. A lot of business-software runs already in some kind of VM, with a JIT compiler. This JIT compilers could easily spit out the hardware depended low-level code instead of e.g. x64 ASM. So a new hardware revision would only require an update to the runtime's JIT compiler. I think IBM is doing something similar for decades now with their mainframes. "Native" executable are "only" some byte-code so you don't ever need to recompile your applications when you upgrade the hardware.