There's a fun curve on this to be sure. If I had to guess, Servers would not go any further than some sort of memory-backplane where the memory for multiple ch

There's a fun curve on this to be sure. If I had to guess, Servers would not go any further than some sort of memory-backplane where the memory for multiple channels was integrated onto a single PCB. Even then, IIRC hot-swapping of memory modules is a thing for some servers, so that will have to be handled somehow.