Incredible rumors concerning AMD's Zen 4 and Zen 5 microarchitectures have been shared that suggest impressive generational gains. Zen 4 will apparently offer +25% IPC gains, +40% overall performance, and it may also bring all-core processing at 5 GHz. If that's not enough to erase memories of the Bulldozer family, then Zen 5 is allegedly set to amaze.
https://www.notebookcheck.net/Zen-4-rumor-bulldozer-smashes-Zen-3-with-alleged-25-IPC-uplift-40-total-gains-and-potential-delivery-of-5-GHz-on-all-cores-while-AMD-s-Zen-5-will-be-even-more-spectacular.519409.0.html