However, in its most recent roadmap issued to investors last week (and now available online in PDF form), the 3rdgeneration Ryzen Threadripper processors are a no-show. We can't say that this revelation is too terribly surprising for a number of reasons, as the 3rd generation Ryzen Threadripper processors share their 7nm Zen 2 microarchitecture with the Ryzen 3000 desktop and 2nd generation EPYC “Rome” server processors.
For starters, AMD's current-generation Ryzen Threadripper 2000 Series processors aren't exactly well past their prime. In fact, they're still kicking ass and taking names (especially in multi-core performance) with SKUs available with up to 32 physical cores capable of executing 64 total threads (Ryzen Threadripper 2990WX). AMD is already delivering comparable performance to Intel's current-generation Core X-Series processors while vastly undercutting them on pricing.
Secondly, it's likely that AMD wants to devote as many resources as possible to the cutthroat desktop market with Ryzen 3000 and the highly lucrative server market with the 2nd generation EPYC processors. With that in mind, AMD can easily wait until 2020 to unleash the Ryzen Threadripper 3000 Series on the market.
The updated presentation also shows that 7nm Zen 2 is currently sampling (in preparation for a Q3 launch), while Zen 3 is "On Track" at 7nm+. Those chips will likely start arriving a little over a year from now in Ryzen 4000 Series processors. Finally, AMD says that Zen 4 is currently "In Design." There are no details surrounding what process node AMD has in store for these processors, but it could be 6nm or 5nm, both of which TSMC is actively developing for customers.