I also categorically disagree with this advice. The people who benefit are not the ones in charge of the decision, and the benefit to your reputation for the ~5

I also categorically disagree with this advice. The people who benefit are not the ones in charge of the decision, and the benefit to your reputation for the ~5 people it really impacts does not outweigh getting to take a stress-free, risk-free sabbatical in between jobs. I have always asked to extend my start date out as far as possible and the new company always pushes back and I end up taking off a few weeks between jobs at most. I am not sacrificing that time for the potential of better parting feelings for a handful of coworkers who take over my stuff, when you should be working toward that lowered bus factor day-to-day, regardless of whether you are planning to leave.