yeah I acknowledged that joke, but if you don't think that, for example, say LLVM is light-years ahead of GCC in implementing plugins that let you do various forms of optimization, you're crazy. It stands to reason that further architectural developments will make things even better than what we have now.

Nowithstanding the fact that your answer is totally unhelpful: I thought about it for a second and I think the answer is basically that if you have a multithreading cores and you're pending on the results of another operation, then you can't necessarily know what optimizations you can do ahead of time because you don't know what other threads are resident on your core, which will affect the on-the-fly reorganization.