Godot is MIT licensed though, there's very little we can do to screw our users if we wanted to, which we do not :)
How long would it take for someone to take over the project (if ever).
One could even imagine scenarios like an originally MIT-licensed software splitting into a commercial company offering commercial paid licenses, plus a community (or even the company itself) offering a GPL-licensed fork. Of course one could then still maintain an additional MIT-licensed fork, but if the rest of the community is happy with GPL and all the development just happens there, your MIT fork will "starve"...
Given the project itself is still strong, this might not be a problem, but then I see no reason why it has chosen it in the first place if not for that specific option.