"I like the idea of using as few powders as possible."
"I don't. A large part of my goal for handloading is to produce the most accurate ammo possible for each of my rigs and each bullet I use. I really don't care if that requires two powders or two dozen. But others have different goals and that's fine too."
I use the optimum powders for my primary/most important cartridges and the bullets I shoot such as the Sierra 77g in the .223R, the Sierra 175g in the .308W and 2 other cartridges.
Does not matter to me if I have 50 pfs less velocity and 0.10" larger groups, the other cartridges I load will use these same powders.
Having room for 4-6, 8 pound cans of the SAME LOT of each of the powders I NEED is far more important than having more powders than anyone else.
T.