There is that nvidia open source thing that recently happened. Still think that's going to break down some doors that Linux gamers have long wanted to see. Like to be able to run their Linux OSes with drivers to their GPUs from Nvidia and play games that way.
For me, my cad software was always windows specific. I think they have Linux versions now though.
Gaming is the other reason.
I think (although I've never tried to verify) Steam is making progress to make most games playable on Linux.
There is that nvidia open source thing that recently happened. Still think that's going to break down some doors that Linux gamers have long wanted to see. Like to be able to run their Linux OSes with drivers to their GPUs from Nvidia and play games that way.