I think the bigger deal with Bethesda’s engine is that it’s built to be very easy for designers to iterate on, which is why it is also so easy for users to mod. They trade a lot of efficiency for scripting systems and level editors that let them whip up sprawling open spaces in a short amount of time, and fill them with dynamic systems like NPC routines and tracking thousands of physics-enabled props. This is probably also why their games are prone to buggy behavior.

Building all of the systems Starfield has at its disposal into Unreal would probably take years, and I’m not convinced the results would be any better.

I mean, to be fair, Starfield doesn’t do it well either. In the 15 hours I played, especially toward the latter end, I ran into plenty of texture pop-in, bad culling, bodies without heads and arms, heads and arms without bodies, bad shading patches, t-posing, stutter, lots of other goofy shit. And granted, my rig’s not the best but I’m playing on medium with a 9600K, 3070, 32GB RAM, and the game’s installed on a Samsung 870 SATA.