I use Linux and Godot is easy to install and use on Linux, and fits with the open-source philosophy. I have not made professional games, but I had a good enough time playing around with Godot for a few hours here and there that I recommend it when I can.

It also works well with Git, which as a coder first, game creator second, I appreciate. I don't think this is the case with Unity, but I am not sure.