There's also the matter of future developers to consider. I'm in the process of looking at game engines to learn, and Unity has decisively crossed itself off the list. Even if current studios and developers stick with Unity, startups and novices would be foolish to pick a game engine that might suddenly decide to charge them out the ass with little to no notice. Existing developers have the issue where they already have tools and experience with Unity, but newer folks don't.
Myself I really wish that Godot would finally start getting traction in being the most advanced and the most used game engine. And it's free.
Just look at Linux - it's free, most used and most customizable server platform, even tho paid alternatives (e.g. Windows server) exists. I wish Godot would become de facto standard game engine.
I doubt it will ever happen but if it dose that would be a perfect fit for open source, big studios could contributr and share parts of their progress between each other like big companies do in the Linux space and at that part it would probably become and stay the most advanced option fairly quickly because you can't compete with a entire industry and community at once!
Godot should definitely be adopted more by the indie and small studio scene. I think there's going to be some folks who slide over to Unreal because Godot's 3D capabilities don't even match Unity's yet, but there's some stuff it can do, and it's in active development.