what's the point of FP if processors are still Von Neumann?

You are shooting yourself in the foot by thinking in a manner inconsistent with the computer.

>>42
... Ouch, man.
Anyway.
``Computer'' was coined to refer to a human with a degree in mathematics performing computations, and I am pretty sure they didn't come with BIOS or a front-side bus.
Functional programming is the application of computer science. All other programming is a bit-flipping compromise.