I don't want to trivialize anything but I most of my time in gamedev was dealing with similar either engine uplevel-integration hell(the team I was on still has

I don't want to trivialize anything but I most of my time in gamedev was dealing with similar either engine uplevel-integration hell(the team I was on still has scars from having to rebaseline UE3 on a 3 month cadence which took... 3 months every time we did it so it was back-to-back uplevels) or dealing with these sorts of things even in established engines. Yes Unity does better but there's a ton of momentum with established commercial engines that have tens of millions of dollars invested in them. It was only recently that Godot has started making some inroads on the indie side of the engine space.