I wonder though.. could you emulate a 20k-core VM with 100 terabytes of RAM on a DC?

Ethernet is fast, you might be able to get in range of DRAM access with an RDMA setup. cache coherency would require some kind of crazy locking, but maybe you could do it with FPGAs attached to the RDMA controllers that implement something like Raft?

it'd be kind of pointless and crash the second any machine in the cluster dies, but kind of a cool idea.

it'd be fun to see what Task Manager would make of it if you could get it to last long enough to boot Windows.