> if slow compilation is such a pain point, I wonder why it takes seven years and counting to fix this bad decision

Maybe we are giving Rust developers computers that are too fast. ;-)

OTOH, it's always wise to design for the future, so it also makes sense to give Rust developers beefy server grade hardware so they can play with SIMD pipelines and all those extra cores and threads, because that's what workstations will be a couple years from now.