There's a vaguely cartoon or fun look to the game but I'm having trouble thinking of good examples. Things have the right proportions but it's stylized just enough.

The Plains of Eidolon (your screenshot) is the first open world area, and looks more plain compared to Venus and the cambion drift. Most of the game is made of stylized tiles stitched into levels. It's more obvious as you see all the syandanas and weird frames and the individual factions.

Aah, but they're tricking you through really good lighting and scene composition;) Everything in this game has its own distinctive twist, like a realistic cartoon. Plus DE are aces at painting a scene!

Granted, their modeling and texture work is damned near witchcraft, I still don't understand how they manage to cram so much detail into a 3D model...

And thank you for the recs! I've already played a bit of Satisfactory and it is very satisfactory (sorry...)! Also bought AER because it looks gorgeous!

AER was a lovely stop-gap for me after I'd finished Outer Wilds and was a bit bereft. Not remotely the same but I loved the music and flying around.