I've also always believed in buying popular calibers, but now......it's hard to find ammo for 9mm,.45, .223, etc. Seems like gun shops are always sold out of the common stuff and its all back ordered. Now might be a good time to own a .204, 25-06, or some other less popular caliber gun.
Luckily, I reload, but have found primers are hard to come by now as well. Hopefully, guns and gun violence find their way off the news and all this gun craziness subsides.