Comment by imtringued

>I often find the default feature implementations in large engines like Unity so lacking I end up writing my own anyway. Eventually, my projects end up being mostly my own tools and systems, and the engine becomes just a vehicle for a nice UI and some rendering...

I honestly don't see anything wrong with using the engine for its UI and "some rendering" kind of sweeps a lot of the complicated 3d light handling under the rug. I think the biggest mistake large engines have made is baking in features as first class citizens instead of those features being part of a standard plugin you could have written yourself from scratch once you reach that stage.

I've contemplated building my own editor UI, but after four weeks I realized that I'm just rebuilding the same UI structure you see in FreeCAD, Blender, Isaac Sim, Godot, etc. There's always a 3D viewport, there's a scene tree and there is an inspector panel for looking at the properties. So why not just use the Godot editor as a UI and provide my own custom nodes? By the time I've outgrown the training wheels, I've spent months working on the actually differentiating features.