This must be a matter of taste because I strongly disagree.

Should probably run cpu benchmarks while slowing water cooling pump + pressurizing cooling system above 9bar and expressing water through carefully tamped specially ground coffee and drip into cup.

or just have a large reservoir, severely overcool the cpu and cold-brew the coffee

Glad you like the project. I might have special taste in coffee, this stuff is pretty good, but honestly I like instant too...

Very little about this project screams "best" or "fully optimised".

Its objectives lie elsewhere.

Good luck hooking up an espresso machine to a PC though.