Fast, RVA23-compatible microarchitectures already exist. Everything high performance seems to be based on RVA23, which is the current application profile and comparable to ARMv9 and x86-64v4.

However, it takes time from microarchitecture to chips, and from chips to products on shelves.

The very first RVA23-compatible chips to show up will likely be the spacemiT K3 SoC, due in development boards April (i.e. next month).

More of them, more performant, such as a development board with the Tenstorrent Ascalon CPU in the form of the Atlantis SoC, which was tapped out recently, are coming this summer.

It is even possible such designs will show up in products aimed at the general public within the present year.