Or I take my perfboard or solid copper base material and be done with it in one afternoon, without waiting 10 days and spending less than $50 shipped.

> For audio stuff you get the advantage of keeping everything nice and tight with lower noise.

IME it is way easier to do low noise / high bandwidth circuits on base material compared to making it work on a PCB layout. This is because the base material gives you a huge, continuous ground plane, and because you use all three dimensions, instead of just two (+- two component layers). Of course, semi-modern components require steady hands.