Wow, did Intel just get totally raped? Their whole HEDT line went obsolete in one day after R7 and to underline it there are already rumours that AMD is going to introduce +8core systems for professional desktop usage.
You're missing some important things though, things that didn't make Intel's "HEDT line" go "obsolete" at all. Not even close I would say. I'll give you a very concrete example to illustrate the considerations in that segment:
I work in content creation, working with audio for tv/film etc. I need a powerful computer. It just so happens that the r7 is an excellent value for most of what I do. I'm also considering moving to video editing to get a bit more steady work. However, I then face several considerations:
1. Total lanes + lane configurations: With Intel's x99 platform I could start with a 28-lane CPU which would be more lanes than the Ryzen can give me, and by simply swapping a CPU I can get up to 40 lanes. The drawback with Ryzen is that I get x8/x8 on the x370, and the rest is PCIe 2.0. But even if I get another x16 slot it'll run at x4 from what I can see, and it still often shares resources with x1 slots. All of that goes through an x4 connection to the CPU.
Now, something that speaks in Ryzen's favor is the NVME m2 being tied directly to the CPU instead of going through the x370, but it doesn't seem that people on the x99 platform suffer from that. And so this is a very real concrete issue.
2. Some software is currently coded with Intel in mind, one example being running AVX2 at 256-bit if I understand correctly. And so there's a pretty big penalty there. If you're looking at 4-8k footage, and hours and hours of it, transcoding it becomes a long process where a 10% difference suddenly becomes a lot of time (compared to a 10% difference in gaming between a 80fps / 88fps frame rate, which I couldn't care less about).
So I think we're seeing the exact opposite of what you're suggesting, and I think Intel's pricing reflects that. As far as I can see they still 'own' the top-tier of HEDT.