"The machine did, however, struggle with one workload: running an Ubuntu VM under VMware Workstation Pro. The laptop just did not enjoy running that at all – the desktop hypervisor hung, and performance of the host OS suffered."
I'm wondering if that's using the Hyper-V shim, or the (in my opinion superior) VMware hypervisor?
My gut instinct is that the hoops were not jumped through to neuter Hyper-V, or that win11 doesn't allow for it.
I've ran Ubbunt/Debian/Win7 (Sometimes more than one VM) in Workstation Pro on some really anemic hardware with OK results.
It's currently chugging away with a Win10 host on a Intel Celeron J3160 with 4 gig of ram.
It's also ran just fine on a Core i7 i7-640M Fujitsu T900 with Win7 as the host.