Drums, definitely not, because they need to be as tight as humanly (or inhumanly, in the case of sample replacement) possible. Multiple overdubs are usually limited to guitars, vocals, etc., to make them more full, because they don't need to be as perfectly tight as a drum hit. And if the musician isn't tight enough to do four takes (meaning, quad-track), he should be tight enough to do two takes (double-tracking, one left, one right), which I honestly prefer, because while well-done quad-tracking will sound better than double-tracking, poorly done quad-tracking sounds phasey and muddy, so I stick to double-tracking and it makes me happy!