From memory AMD have said they are looking to keep to an 18month timetable for new arch introductions, so with Zen3 debuting later this year, that would put zen4 firmly in the first half of 2022.

blue (blue.delete@this.blue.com) on August 12, 2020 10:03 pm wrote:
> Maynard Handley (name99.delete@this.name99.org) on August 12, 2020 12:46 pm wrote:
> > Do you believe that AMD can ship a substantial boost over Zen 3 by end of 2021?
>
> End of 2021 for volume is probably a stretch, but we see Zen 3
> products will begin to sell in 2020, based on AMD's comment.
>
> So I think AMD could push and if not having Zen 4 based products shipping in volume, they
> could at least have everything nailed down and announced. I also do think that your end
> of 2021 timeline for Nuvia is probably optimistic. Their top talent (presumably all/most
> of their talent lower down also) is very good, but it is a "brand new" architecture.