Any non-trivial feature that Unity has where Godot lacks is usually re-implemented by bigger developers anyway. For Indie developers, these features are almost never necessary.
When developing tools, Godot is far superior. Any support guarantee that Unity provides is easily bested by the ability to inspect the Godot source code without signing an NDA. With the changes in Godot 4, developing add-on tools is easier than ever.
The Godot project is well managed, with pull requests being merged in a timely manner without a loss of overall project quality.
The mass exodus to Godot is perfectly timed. Godot 4 just released with many changes and improvements, addressing almost all the usual pain points between the two engines (especially in 3D).