I've said in other comments my 4790K is getting a bit old at this point, not slow for most stuff, but definitely hungry for more cores for a lot of tasks, and looking to break past 32gb of ram. I'd also been considering Epyc or even Xeon, as older/used Xeons can be very well priced. Guess I'm waiting until September.
I’m in nearly the exact some boat. I’d like to have ECC ram the second time around for my home server, which the Zen chips reportedly support though I don’t see people using. I’d also like better power usage. I think I’m going to wait one more year.
For now, planning on just playing around with it. I haven't decided if I'll be running Windows or Linux as the base OS yet.
Game developers have always made a good use of the available resources. They'll use the extra power available. The newest techniques they have, like work stealing queues, can scale to a large number of cores.
So games and gamers will use the extra cores. It's much less of a jump from 4 cores to 16 than from 1 to 2.
Give it a year or two.
No it's not worth it IMO, but some people spend crazy amounts chasing a few extra fps.