Unity is not going anywhere, even in a bankruptcy it would get acquired by the likes of Microsoft or Meta. The “good guys startup” Unity is long gone, and it’s been replaced by the same corporate structure you would expect anywhere.
Tying yourself to Unreal would be just as naive, and Godot is nowhere ready to fill the niche Unity is filling. I would place the opposite bet as yours, the vast majority of actual game devs are not rich enough nor care enough about corporate drama to ever switch engine for possibly worst. Also, experienced C# Unity devs and experienced C++ Unreal devs are not that interchangeable. Unity made this move to survive and they know there is no true alternative.
This is my pov, I worked in the industry for over a decade and I am an Unity ex-employee.