If you understood the problem then you’d know that their argument is about how Unity’s new pricing change is retroactive, affecting all Unity versions and charging fees to devs for games made years ago.

Unreal uses perpetual licenses for their versions meaning this kind of bullshit behavior is not possible

Perhaps it is you who doesn't understand. We all get that part, and it makes sense in isolation. Yes, that is better.

Then it's goofy af to say Godot might make a license change that necessitates using one version in perpetuity-except a version you and others are allowed to modify and distribute.

In opensource, you can use that version and add more changes to it after the original author changed the license.

Doubly so, since the "something else" is able to be updated by you, if necessary.