I've been using 47,5" drivers lately and a 3 wood. But I rediscovered a couple of 44.5" drivers in the basement, two old favorites, so I'm going to get reacquainted with them this afternoon at the range. I've only been carting 11-12 clubs for a couple of years now, so there's room in the bag if I want to add one for a few rounds.
I found I'm not significantly less accurate at much longer -- maybe because I don't get too much OTT with the longer shaft. I do get the wormburner snap hook every now and then, but they used to pop up with shorter drivers, too.