Clock speeds mean nothing in isolation, sandy. You are aware that Zen 2 has a significant IPC bump over previous iterations yeah?
but what is it you actually want? One minute you're saying it's cores, then you're saying it's I/O infrastructure and you don't need cores. Well core-for-core Threadripper 3 is vastly superior to whatever HEDT platform you have currently, that's just going to be a fact.
The fact that your existing system does everything you need - and therefore you don't actually require an upgrade - is a completely different issue.
You've obviously got the wrong person, I have never wanted more cores, I rock a 1900x an 8 core HEDT chip, its enough, only in some use cases would more work for me but in those cases my add in cards are more powerful than CPU.
I would like more performance, granted Zen 2 has more performance core for core, but it is only ~10% IPC bump, so clock speeds are important as that is where the rest of the performance comes from, but that performance need to be usable, not much point in a chip that can do 4.7Ghz on one core but drops to slow speeds when others are loaded, I fear that will be the case for TR3, with a 3900x you loose 4-500Mhz with thread usage, the first 300Mhz with only 4threads loaded, that chip only has 12 cores, once you double the core count and increase thermal load what will the TR3 chips drop by?
I'll be keeping an eye open for the reviews but it doesn't look like TR3 l be the chip for me. The 3950 probably is, in fact the 3900x would be just fine but its on a limited platform, I'd loose half my disks, perhaps less of an issue when 4Tb drives drop.