Even if you DO buy a lot of expensive hardware, it’s a giant pain in the ass. There are no good rackmount solutions and so we ended up with a room full of expensive “trashcan” macs and they were STILL the biggest drag on our build infra.

This has been an issue for decades. Twenty years ago I was doing grid/HPC computing at Sun and there were a lot of bioinformatics firms that used macs and wanted compute clusters of them. It was a huge problem even then.