Bethesda games are renowned for packing in an awful lot of content, and Starfield is no exception. Granted, the main story is perhaps a little shorter than some might have expected, but there's more than enough going on elsewhere to keep players busy for hundreds of hours; if not thousands.
Starfield: What to Do After Finishing the Main Story (Post-Game Content Guide)
Starfield's main story may be a little on the short side, but there's more than enough content to keep players busy as they head into the post-game.