We are still waiting for AMD to unveil its next generation of Ryzen Threadripper processors for enthusiasts, which raises the question, has the company given up on the high end desktop (HEDT) segment? There is no indication that it has, so no worries there. As for when Threadripper CPUs based on Zen 3 will arrive, rumor has it we will see

Source: Hot Hardware – AMD Threadripper 5000 Zen 3 Chagall CPUs Could Launch This Fall With 64 Heavy Metal Cores