I played for about 100 hours on PC and the game crashed only a few times, no more than any other game, it felt. I always used the most recent graphics driver, so make sure that you're updated. Also, I used one of the performance mods...
this one, I think. It may reduce the stuttering, if not also the crashing. In fact, if you're already using any mods, you might try removing them and even re-installing the game, just in case one of them is causing your crashing. This is especially true if the mods use SFSE or some other loader.
Lastly, if you're on Windows 11, an update that Microsoft rolled out a couple of weeks ago is known to be behind some crashing of Starfield. See if you have it installed and try uninstalling it.
Windows 11 October 2023 Update crashing games and File Explorer