My point is, it's impossible to test everything in a reasonable timeframe. It would be much, much more convenient to know (call it "having an accurate theory")

My point is, it's impossible to test everything in a reasonable timeframe. It would be much, much more convenient to know (call it "having an accurate theory") beforehand which approach will be faster. Imagine having to design electronics the way we design performant programs. Will this opamp survive the load? Who knows, let's build and try these five alternatives of the circuit and see which one of them will not blow. Oh, this one survived but it distorts the input signal horribly ("yeah, this one is fast, but it has multithreading correctness issues and reintroduction of locks makes it again about as slow"), what a shame. Back to the drawing board.