For completeness: one other option is to revert your Mac to Ventura. This is difficult as it requires wiping your hard drive. The only way you can do it is if you have a full backup of your machine prior to installing Sonoma (something Apple and everyone recommends but.... how many people actually do it?) 

Even if you go this route how do you know with certainty the backup will restore correctly ahead of time? If it were me I'd choose the Parallels Ventura route ahead of this. 

Another option is to use a second mac running Ventura. I wouldn't do that either - Parallels has gotten pretty good.