Yea, no. AOP was never worth the trouble.

And one giant problem with it is the reliance on global variables. An AOP wrapper has to modify something, and it typically does not have enough access to enough context to do it.

So it has to rely on ambient data that has to be saved in a global variable. And this is _bad_. It makes data flow opaque and impossible to follow.

And then there are issues with debugging. Where do you put a breakpoint? What happens if you try to step into an instrumented method?

PS: yes, a global variable can technically be a thread-local variable. It doesn't matter, it's still a non-local ambient state.