Thanks dempson.
I'm now at the point of upgrading to macOS Monterey after all (mainly for other reasons than VMware Fusion). And I then need to upgrade VMware Fusion anyway. However, I'm looking for details on the hypervisor change that you mention. Is it documented in any detail somewhere? In fact I didn't see anything about it in the release notes for 12.2. I'd like to know if any of the "advanced networking" changes would affect my use, as I do quite a bit of networking between my VMs on my host. I'm just not sure if it's considered advanced in this context or not.