I'm one that loves to take three different bows out for one shooting session. I know I'd be a better shot if I just stuck with one, but like Popeye, "I yam what I yam..."
Recently, I've been parting with bows on an almost weekly basis because my draw weight capability changed, and that is still going on, but normally, as someone mentioned above, the pegs are the limitation... two rows of pegs, 18 in each row. When I start haveing to tripleup on the pegs, or move bows off the front row to get out the ones on the back row, it's time to thin.
Now that I"m trying some recurves, I'm even more limited (OK... deep sighs and a chorus of "poor you's")... I have to skip pegs between recurves so they'll hang neat... Fortunately, my recurves are mostly tending toward ILF, so I'll be collecting just limbs instead of whole bows :^)
Dick in Seattle