I think the engine would matter a bit less for TES/FO if they’re following the same map design. Starfield was just way too ambitious and poorly designed for the engine they had. Potato physics and object permanence is good but seamless streaming and no loading screens is much better for a space exploration game. For TES/FO, all that object permanence leads to good environmental story telling and useful loot around dungeons if done well, but at this point Todd knows how they are gonna screw it up this time.