So far Fusion is doing what I need and since it offers easy deployment of virtual images to their server software, guess what I'll be looking to deploy as new server software?
PARALLELS DESKTOP FOR MAC SUPPORT UPDATE
Parallel's main competitor for this product is VMware Fusion, which is now more than good enough feature wise, but in addition VMware has worked out that the license should be associated with the person, not with a specific computer, presumably on the principle that I'm only working on one computer at once. Parallels for Mac has announced Parallels Desktop 18, a new update that brings full support for the ProMotion displays in the 14-inch and 16-inch MacBook Pros, improved performance on the M1 Ultra chip, easier Windows 11 setup, and more.
To do this with Parallels desktop you need to buy multiple licenses or move the single license between computers which is both clunky and limited in that it will stop working if you make too many transfers. These days I don't do all my work on a single desktop computer, I want to be able to continue working on my MacBook when I'm not sat at my desk. One area that Parallels desktop has fallen behind other similar products is on the licensing front. I won't be upgrading to version 14 though. I've had problems over the years but on the whole it's been good enough and did what I needed, so a reasonably happy customer who then went off and deployed their Parallels Cloud Server software at my company on the basis of that. I've bought and used every release of Parallels since version 3 up to and including version 13.