It drives my wife crazy, but I tend to hoard things I think I may need in the future. I've been known to find a use for things I've had stashed away for over 20 years.
I've collected a lot of reloading brass, little by little, over the past few decades, often shot by others who don't reload. I collected 30-06 brass before I had a 30-06, or the 338-06 because I figured someday, I may have use for it.
Today, I went through a lot of the 223/5.56 brass I've collected over the years, putting the military stuff aside and sorting the 223 marked brass by manufacturer.
I've already loaded 250 rounds of "used" 223 brass and have another 400. With everything being so hard to get, I'm glad I have it.
Most of it is Federal (265), Remington (130), Winchester (120), Norma (85) and about 50 assorted lesser brands.
I guess what triggered me to go through this stuff is I recently went to both the Cabela's and Midway USA websites and neither of them had any 30-06 brass for sale and I was shocked! Good thing I really didn't need it! I still have lots of it (new + used) that I have not used yet. Ditto for the 220 and 270 WSM (mostly new unused brass for those two cartridges purchased years ago). Although I've found a little used 270 WSM, I've never found any used 220 Swift brass.