If you have anything that straight-up won’t work in WINE or Mono, or only partially works in WINE or Mono (eg. CUETools when trying to use external encoders with it; that option is broken in both WINE and Mono but works normally in Windows, and CUETools is a FOSS app suite distributed under GPL to boot), just run LTSC in a VM, it still lets you use a local account for now, and that also goes for Win11 LTSC, both that and Win10 LTSC let you set up local accounts.
If you have anything that straight-up won’t work in WINE or Mono, or only partially works in WINE or Mono (eg. CUETools when trying to use external encoders with it; that option is broken in both WINE and Mono but works normally in Windows, and CUETools is a FOSS app suite distributed under GPL to boot), just run LTSC in a VM, it still lets you use a local account for now, and that also goes for Win11 LTSC, both that and Win10 LTSC let you set up local accounts.
As an aside to your post - have you tried Flacon.
I haven’t needed CUETools in years.