I am a big BIG fan of Bethesda's Elder Scrolls and I consider Morrowind one of the best games ever made (my top 2 are Morrowind and Doom in no particular order). I have put in only a few hours into Starfield (so far), and I have to say I like it less and less. Primarily my complaints lie with all the loading scenes that break the illusion of an immersive, seamless galaxy to explore. It feels like Skyrim with even more disconnected regions.
In Morrowind you could walk from the wilderness into a city with no observable loading, the only loading screens were upon fast-travel (which was not necessary) or going indoors. As you leveled up, you could learn levitate spells that let you fly over seemingly insurmountable mountain ranges or water breathing spells that let you explore underwater. You could learn water walking and even walk across the ocean from the mainland to the new island included in the Bloodmoon expansion, if you were patient enough and didn't want to fast-travel via ship.
Oblivion did away with some of the crazier things (like Levitation and Water Walking), and added loading screens as you move into cities and this trend sadly continued into Skyrim. And yet, I still loved those games and devoured them, spending hours. Something about the ability to look at the horizon and say "I'm going to walk to there" was very captivating.
In Starfield, you get loading screen after loading screen, moving from location to location, outdoor to indoor, in and out of spaceships, launching from the surface, grav-jumping, etc. I know this criticism is not incredibly insightful or novel; many folks have already complained loudly about this online and contrasted it against the illusion of seamlessness in No Man's Sky. I know I'm just adding to the din, but I can't help myself, my disappointment is as vast as the regions in Starfield are not.
There are no enormous planets floating in endless space. You're just an ant hopping from leaf to pretty leaf trying to cross a river. I expected so much more.
I will give it a few more hours, but sadly it's been a dud for me so far. Anybody have a recommendation for a modern open world game that knows how to maintain the illusion?