If I had to get rid of every bass but one, there is no doubt in my mind that my career would continue along as it always has. I almost never bring more than one bass to my gigs (well, more than one electric...I also double on upright on most of them), and when I do, it's mainly to show off the collection or do comparisons in a live environment as I'm not a fan of changing basses in the middle of a show...I have enough to do with the upright. But I'd still want to have two in case one has to visit the shop, and since nobody's forcing me to have only one, I think I'll be keeping all of themBut I'm totally behind those of you who are fine with only one. For years, I really only had one good bass, and I kept gigging.
EDIT: Did I post this once before? Apologies if I did.
There is nothing wrong with repeating common sense!