I’d expect Zen 5 in 2024. AMD has been on a decently consistent release schedule for Zen CPUs.
Zen 1: Mar 2017
Zen+: April 2018 (+13 months)
Zen 2: July 2019 (+15 months)
Zen 3: November 2020 (+16 months)
Zen 4: September 2022 (+22 months)
Lots of clustering around ~15 months, with Zen 4 as the major exception. Zen 4 had to run through the whole pandemic supply chain gauntlet to get released, which explains most of that delay to me. Especially since the supply chain issues hit semiconductors hardest. In theory that’d put Zen 5 in early 2024, but I’d guess somewhere from late spring through early fall.
I want to know when the 3D cache variants of Zen 5 are coming out. I built a good Zen 3 system about a year before those were available. Don’t feel like I can justify the expense of going to a 5800X3D when I already have a 5800x, but I’d love to have the 3D cache. Once the Zen 5 versions are out I hope to make a new system around that.