They still value raw CPU grunt for legacy software that can't easily be ported to use GPU. There's a lot of old software that has received billions in verificat

They still value raw CPU grunt for legacy software that can't easily be ported to use GPU. There's a lot of old software that has received billions in verification and validation work (especially in the nuclear area, which is important for DoE's mission) and porting it to GPU would invalidate that. This software is typically being replaced by more modern stuff, but it is often validated against its predecessor, so you still need to have the resources to run the older software.