For me I have to keep a Windows VM around to run payroll software once a month. There is a Linux version of the software but it depends on some ancient glibc, IIRC. It takes up around 50GB of my NVMe, which I'd move it off of if it didn't already take around 15 minutes for this app to finish loading. All around it is very annoying. The one upside is that while this app is loading it has this ugly always-on-top logo for HMRC but because it's in a VM now I don't have to see it.