Comment by wtallis
Based on historical trends, that's never going to happen for any workloads where single-thread performance or power efficiency matter. If you're doing something where latency doesn't matter but throughput does, then old server processors with high core counts are often a reasonable option, if you can tolerate them being hot and loud. But once we reached the point where HEDT processors could no longer offer any benefits for gaming, the HEDT market shrank drastically and there isn't much left to distinguish the HEDT customer base from the traditional workstation customers.
I'm not going to disagree outright, but you're going to pay quite a bit for such a combination of single-thread peak performance and high power efficiency. It's not clear why we should be regarding that as our "default" of sorts, given that practical workloads increasingly benefit from good multicore performance. Even gaming is now more reliant on GPU performance (which in principle ought to benefit from the high PCIe bandwidth of server parts) than CPU.