Thanks for the info! Very interesting.
If not obvious - Win 11 VMs seem to continue working AND updating AND with both Dev&Beta content. I have several of them, mostly installed from ISO (with a 3rd party ISO-creator from Microsoft content, prior to Microsoft's own ISOs). My VMware Workstation Player version is 16.1. Mostly I run them on an old i7 (probably 2nd generation and thus very far from being supported in official Win 11) based workstation with Kubuntu 2020.04.2 LTS. They work fine and a well-balanced workstation isn't particularly slow.
Surprisingly, I have had to fight OFF my Win 10 computer updates into Win 11. This has something to do with the Insider program and Microsoft login, which you need to use in order to get Win 11 in the first place and even install it. Even a new Win10 install started to Upgrade into Win 11 in the middle of the install without a cancel option. I guess, having separate Microsoft logins (one for normal Win10 use&else, and one for Win 11 related) would have solved the problem.