I dunno, I think it's a game somewhat damned by faint praise. I hear "It's good, not great" a lot and I get it. If you like Skyrim you will like Starfield. But I'd say the big achievement is to scale up a game like Skyrim into such a big playspace.
It's certainly good quality in terms of the look and what they've technically achieved. But the actual gameplay isn't that far away from what they did in Skyrim and Fallout. I get it - if it ain't broke, don't fix it - but to be honest it feels a little dated. And No Man's Sky does alot of the non-RPG elements better.
It's been a strong year for games; and look at Baldur's Gate 3 - that game actually pushed forward narrative game play.
Starfield is huge and interesting, but ultimately a bit samey. I think the "ocean wide, inch deep" is too far and unfair but the basic concept kinda applies in a crude way. Baldur's Gate 3 is smaller in scope but so much richer and varied. Time was Bethesda was the undisputed king of RPGs, but I think CDProject Red supassed them with the story telling in Witcher 3 (and then fell back with Cyberpunk 2077) and now Larian have supassed both with Baldur's Gate 3.
It's a good game, but it's impact is dimmed a bit by what else has come. It'll make a ton of money and probably be around for years, but it doesn't feel the same huge leap forward as when Skyrim came out. But hey, hard act to follow to be fair.