Yeah, this is mostly why I haven't switched to 4.0 yet, though I haven't been actively working on much recently. I know that things will change in alpha, they say beta is feature locked, but that doesn't mean there won't be bugs or potential breakage, just means the API doesn't change. I do plan to ship the game I'm making in Godot 4.0, but I've just been doing small tests, nothing serious at this point.