It's good. You know it's good. You know why it's good. It uses its medium to the full potential in terms of story, gameplay, etc. etc. It kind of makes most other games worse by proximity because they weren't as good at being games as Outer Wilds is. Also one of the few pieces of media to make me shed a few tears, even if after the fact.

Everything else to say has probably already been said so instead I'll bitch about something that doesn't matter at all: I see fans say shit like "u'll never experience it again u can never replay :(((" It's like, yeah, that applies to fuckin' everything! That's sort of a big contributing factor to why this is special! Experiences are always fleeting, positive ones moreso. Cherish your memories but don't wallow in them; move on in the hopes to experience even greater things, ya damn redditor.
I think it rubs me the wrong way cause gamers seem tired of how bloated, stretched out, and unoriginal modern games can be but then their first response to something new and exciting is "no replayability. too short. i want moree. sequel when?" Like, you're part of the problem! That type of feedback is why almost every good game this year has been a remake or a sequel, they're just giving us what we ask for which is more of the same. This is probably a human nature thing and I'm just as much of a perpetrator of this as anybody (Silksong when?).
Wait, what was I doing? Was this a review for something?

(Includes Echoes of the Eye DLC)
(Mastered because I got all the achievements)