Yeah, I think we're actually of the same mindset, but I failed to broadcast it.
With Threadripper, you get 64 PCI-E lanes and quad-channel memory. I'm going to need to build a deep learning machine here in about a year or so; that means Ryzen won't really be in the cards for me because I'll need at least 48 PCI-E lanes (planning on running 3 RTX Titan, or whatever'll be available a year from now), leaving the last 16 open for NVMe SSDs, which I'd like to run at least two in RAID-0, and maybe 3 depending on which motherboard I settle on.
With DDR4-5000, you're looking at 80 GB/s in dual channel mode. That's knocking pretty close on the door of DDR4-2933 in quad channel, which is 93 GB/s.
Jesus Larry, as I'm going through this, you're talking me into getting this Threadripper... Hot deal for a data scientist after all.