Think that this whole gas shortage build up is one of those stories similar to that old Millenium one of planes falling out of the sky etc.
Whereas, it is always wise to be a little prepared any and every winter for an occasional outage, I am amazed that people have spare money (at the moment) to spend on special items in case of such an outage.
No special purchasers for me. I have, for very many year ,had a wind-up radio and wind-up lantern, and those , along with a couple of powerful battery operated lanterns are where I can get to them easily. Honestly - even it does happen ( and it is unlikely it will), do you really need something special for cooking, etc.? Surely, you can manage those three hours curled up under a blanket, reading or knitting or even just resting, etc.
Bet the camping goods manufacturers are loving all this hysteria!!!!