There always seems to be buyers for more exotic high end hardware. That market has been shrinking and expanding, well since the first computer, as mainstream machines become more capable and people discover more uses for large coherent machines.

But users of 16 socket machines, will just step down to 4 socket epyc machines with 512 cores (or whatever). And someone else will realize that moving their "web scale" cluster from 5k machines, down to a single machine with 16 sockets results in lower latency and less cost. (or whatever).