Pros:
- I have the source. I don’t have to wait for fixes or features. I just do it myself and send a patch or PR upstream.
- I can run it on just about anything, and well.
- Sane defaults and handling of user permissions - by design
- Modern filesystems that don’t silently rot your data
- Full control
- No forced updates
- No telemetry
Cons:
- Not a priority for pro applications
- Not fully POSIX compliant
I haven’t used windows in almost 30 years, but… I probably missed some games at first that DOSBox couldn’t run well (yet). Not a problem any more.




Linux has extended quite a few system calls. Not really a problem as they mostly support the POSIX ways.
But there are a few corner cases around threading and file locks that do break on mainline Linux.
Not too big to overcome, as there are exceptions like EulerOS that are both compliant and certified.