I posted a shorter version of this elsewhere in here but I've thought more and want to expand.

Disclaimer: I really like both no man's sky and starfield. Gonna be down on both of them but I've got hundreds of hours in NMS and I expect to have hundreds more in SF, they are both good games, I have no regrets about buying either of them.

That said, I've realized that starfield is actually making me low-key kind of angry at NMS, for all the potential it wasted. It's showing just how little extra depth NMS could have used (could still use) to be great. There are really only a couple fairly minor ways that starfield is better, and yet for me and I think a lot of people they spell the difference between "fun sandbox" and "awesome game". Starfield is so shallow on all of these that despite being the first game to really deliver on the promise of an open world space RPG sandbox, it's like a wish-dot-com version of what nms could be.

First, combat. Nms has all right space combat, nothing great but acceptable, but there's no excusing its ground combat. There's effectively one enemy, they're not really designed to be fought most of the time, and they're almost never involved in battles of any meaning. The combat overhaul added some mechanics but didn't solve the problem... in a way it's worse now because fighting seems like it could be interesting. How come when I find a trading post it's never a ruin overrun by pirates, with scattered notes from the lost inhabitants, written in their native language so that if I can speak it I can read their sad story? Why don't I ever find a detail of gek security bots defending the inner chambers of a crashed frigate? Why can't I have a shootout with the crew of a frigate on board its procedurally generated interior?

That leads into the issue that there's no story at all. People complain about the main quest of SF, but nms has one of the flimsiest, poorest written central plots of any game I've ever seen. That would be okay, but there are also no side quests. You can't stumble upon an abandoned mine, or have a spacer randomly ask you to help break a blockade of their home system. There are a tiny number of very shallow fetch quests, but nothing with even a hint of effort in the writing.

I get a bit annoyed at starfield for systems not interacting. Like, i have a house, but I can't build outpost buildings around it, eg. However, NMS takes that to extremes with how outpost building, village building, and frigate building all seem like they're actively hostile to each other, as if coming from different games. IIRC even some of the outpost components won't properly snap together if they're from different 'styles' of outpost, although I may be misremembering.

Add to that that there's also not a lot of gear collecting mechanics, minimal ways to display loot, minimal character customisation, and so on, and it's just... sigh. Everything nms does feels like it falls just short of being amazing, but they get bored right before completing the last step to bring it all home and then they go work on another system that they'll get 3/4 through and then abandon. I wish it had mods.

Meanwhile, starfield doesn't do any individually thing particularly well either, but unlike NMS, it feels like I can do stuff with what I make. I can build a ship... and then take it smuggling! Or fight pirates! I can have NPCs on board and they'll chat with each other while I'm flying around, and help run the ship! They're not all well written, but they're actually written, and do more than just stand around saying one line back at me. It's frustrating, because honestly, taken on its own, starfield isn't particularly remarkable (see how bland space travel is eg) but there's nothing out there that's actually gone the very obvious extra mile of "okay we have beautiful worlds to explore, what if now we put some things to do on them"