Case in point, XNA has multiple successors (FNA, MonoGame) supported by companies that make money by porting games to consoles.
I don't agree it's "only good", there's definitely cause for concern, but I'll try to be carefully optimistic about the whole thing and wish the project all the best.
Since Godot is MIT other devs can always fork the engine and start developing from there if this ever happens, but the expertise from the original devs would still be lost.
from my understanding, this is simply godot developers making a separate company for things that can never be open sourced to begin with. What conflict of interest exists now that wouldn't for people who want to champion their own engine?
If your scope was to create a game on PC for Godot, nothing changed. If it was to get a game on console, this may have made life much easier for you. If Microsoft or Epic wanted to aquire the engine for themselves, it would have happened with or without W4 games