Each shortage taught me something, and each one I was prepared in some ways and not others. Hard to predict.
The industries inability to rise to demand is a bit concerning. Not sure if it's the mom and pop nature of the sport, the consolidation or the larger societal factors at play. It certainly cannot scale up and down fast enough to meet sporting demands, scares me to think what we'd do in a real conflict.
During WWII, many of the companies we know began during the shortages caused by war production
RCBS, Speer, etc. Both of these used recycled 22 brass for bullet jackets to feed their swages and feed their need for shooting. I have several sets of rifle and pistol caliber swage dies I bought decades ago, and while most of them have seen little use the past several years, I have restarted that old hobby. Even my old lead casting molds are coming of the shelves again, and I have found new sources of free to cheap wheel weights lead to feed those molds.
Even the old boyhood practice of making our own black powder is being considered again, but what would really be nice is to start a business of smokeless powder production.
I think many of us will relearn old ways to make things to support our desire for shooting.