lol I saw the exact same JIT non determinism argument on reddit. The thing is, if JIT cannot replace a hotspot with a 100 percent functionally identical snippet of code then the JIT is just in time wrong and will be either patched, repaired or orphaned.

So all of a sudden all focus is on the word "determinism", and before even going down this route you have to agree on what aspect of the subject are you declaring to be "deterministic?"

Its sort of like chatting with libertarians, as soon as you agree that taxation is theft and democracy is tyranny then all problems melt away!