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This is true, but I suspect that you're getting downvoted because python doesn't do bytecode optimization.

CPython doesn't. But the other Python implementations (PyPy, GraalVM, et al) don't even use the CPython bytecode.

Also true... but this decorator isn't going to work in that context.

Cpython absolutely does, just not much of it (it has a peephole optimiser with a very small set of opts).

Properly implemented tail calls are all you need.

You can get loops and goto etc from there.

(You might still want extra first class support for eg exceptions.)

yes they can be used for evil but how are exceptions different?