[SuperV1234]

Utter BS. Compilation times matter for productivity, developer motivation, iteration speed, CI turnaround time, and so on.

I'm sure you wouldn't say "it doesn't matter how long it takes to compile" it if took days. So where do you draw the line? Regardless, it matters.

[Panzerschrek]

Even days of compilation may be an acceptable price for good optimization, as long as debug builds or builds with minimal optimizations are fast enough.