I just bought 576 cans of cat food, plus another 3 kg. of dry, for one cat! Let's see, that should be enough canned food for one year, seven months, since he only eats one can a day.
And what happens if your cat decides he no longer likes that brand or flavor? Mine would do that to me if I tried to stock up on cans.
I'm pretty lucky with dry cat food, currently I have around 100-120lbs of dry maxximum nutrition(or similar formula but different brand name) for the two outdoor cats. Occasionally I give away dry food to my dad or to a neighbor, but that's mostly to keep any from expiring (don't forget that food expires when stocking up!). And for Sho and Tomas, I have 50 lbs of castor & pollux.
I really don't have a tendency to hoard or even consider hoarding animals. If you can't give each one equal attention, then you have too many.
I do however hate throwing things away. If I can fix it or 'might' need it again then I keep it. Bits of paper, ribbon, string, wire, fake plants, it's all sorted and stashed away somewhere.