If the software you need only runs on Windows then you should pay for Windows. Those that can move to Mac, Linux, etc and get away with using Wine or other alternatives should. The markets for alternative OS'es will grow then more people will be able to move.
Sounds like you are stuck on the Windows environment. You should stay and pay for Windows. There's nothing wrong with that.
No idea whether or not it's a good replacement as I've never used either.
Use your Windows only software in there
Adobe will cross-license Mac Photoshop for you. Have to talk to a person, deactivate PS, and fill out a destruction form.
Secondly, I'm pointing out that a lot of people have spent money on licenses for Windows software that has a Mac/*nix equivalent. (I haven't personally, but this applies to a lot of people.) If you have hundreds or thousands of dollars invested in those licenses, switching away might not be financially viable.
If either of these situations applies to you, I sympathize with your complaints about Windows and its licensing system.