It's sort of surprising to anyone who hasn't been looking for ammo for awhile that there's no .22LR. Several reasons for it, I think: 1. Price of center-fire ammo is way up so people are practicing with .22 cal. 2. People expect a zombie apocalypse soon and plan on using .22 ammo like currency. If the predicted apocalypse doesn't happen a lot of people are going to get stuck with a lot of .22 ammo that they bought at premium prices, and they'll have to figure what to do about the sunk cost.
Next thing yah know Airsoft pellets will be impossible to find. I guess it's a good time to fill out your knife collection... Maybe invest in a trebuchet?