There is a whole universe of good-enough desktop computers that doesn't care that much about performance, but where power consumption is important, because it makes the computer bulky, noisy, and expensive.

I'd love to have a Xeon 6, a big EPYC, or an AmpereOne (or a loaded IBM LinuxOne Express) as my daily driver, but that's just not something I can justify. It'd not be easy to come up with something for all this compute capacity to do. A reasonable GPU is a much better match for most of my workloads, which aren't even about pushing pixels anymore - iGPUs are enough these days - but multiplying matrices with embarrassingly low precision, so it can pretend to understand programming tasks.