Not everybody is looking for that resume padding type of job where they bounce from job to job trying not to look stale. In the past, it used to look bad having such short stints on a your resume as it meant you weren't the most stable employee. Now, it's the opposite and your resume has to look like it has ADHD with any stint lasting longer than 18 months being a negative. (maybe a bit hyperbolic).

On a less sarcastic vein, some people find a job that they really like and enjoy. The pay may not be as much as somewhere else, but a satisfying job that is stable and provides for ones needs seems to be a concept lost in the tech (silicon valley) world. It's all about rocketships to the moon type of salary wants. If I found a gig like that sending manmade thing to another planet/moon that ultimately advanced human understanding, I'd definitely be willing to retire in that role. In today's world, there are plenty of other side hustles to help offset income needs. I'm a survey of 1 though.