It was worse than even that, several parts of the build process were fully sequential. I only got benefit of multiple cores at all because the tooling in those

It was worse than even that, several parts of the build process were fully sequential. I only got benefit of multiple cores at all because the tooling in those sequential steps were utilizing it, or related system services were. But, yes, I also did change at least one config to allow it to spawn more than 2 threads.