It depends?
I normally go into character creation with an idea about what concept I want to play, and not all concepts work with an extremely low score. Some will, or can be made to, but sometimes you just want at least minimal competence.
My regular DM uses 4d6 drop lowest, but with the caveat that if you don’t roll any scores 8 or below, your lowest score becomes 8. Which is a nice idea, and one I’m going to pinch next time I think. We have two games going currently and I’ve dumped Strength both times (8 for the warlock, 5 for the artificer, and it worked well for the concept both times). I was wondering whether we’d only see Str and Cha used as dump stats, but it’s actually more varied than that. Con is the only stat nobody’s dumped across two games.