I think it all depends on if ThreadRipper gets a new socket. Matisse is 2 channel DDR, Threadripper is currently 4 channel, and Rome, the new server platform, is supposed to be 8 channel.
Using the Rome platform unmodified means 8 channel matching DDR4 kits for consumers. Re-using Matisse silicon glued together makes next-gen ThreadRipper into a NUMA device. Maybe AMD has an I/O die just for the low volume ThreadRipper in production. Hopefully, AMD will just harvest Rome I/O dies for ThreadRipper and tease us with 32, 48, and 64 core models that work on the existing TR4 socket.
Using the Rome platform unmodified means 8 channel matching DDR4 kits for consumers. Re-using Matisse silicon glued together makes next-gen ThreadRipper into a NUMA device. Maybe AMD has an I/O die just for the low volume ThreadRipper in production. Hopefully, AMD will just harvest Rome I/O dies for ThreadRipper and tease us with 32, 48, and 64 core models that work on the existing TR4 socket.