Also the cost of switching is not insignificant. Learning new tools, APIs and workflows takes a lot of time and effort. The way Godot works is quite different to unity or unreal. It took me some time to get comfortable enough to not instantly ragequit when trying to make a godot project.
True, however game jams are often used to learn/reinforce learning for new tech, right? I question how much of it is the sunk cost of having to learn a new… well… everything.
I’d be very interested to see a breakdown by game characteristics. Genre, but particularly 2d vs 3d. I think Godot is well known for 2d, less so for 3d.