Why? because this time they have no competition, 2990WX/2970WX are cheap because in Windows they are many times slower then 2950X and Intel X299 16C/18C are more attractive, but this time it will be different story so the price will be higher, look at Puget benchmarks, the 3900X matching 2950X in almost every benchmark, now think about 3950X and imagine how 32C with 128MB/256MB with Quad channel memory with 250W TPD will perform, even $1999 will be cheap price for it.
Also if AMD will use ROME I/O chiplet as Chipset then be ready for ~30~40W Chipset with massive cooling and super high prices for X599.
And 64C part will compete against $4500 XEON W-3275- so why not? AMD will be stupid if they price it lower.
quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.
ark.intel.com