when i got my henry lever-action, large-loop carbine for $270 before the china flu i had a choice of 22lr or 22wmr. both were slightly bruised floor models in an increasingly tacticool lgs that wanted them gone. i chose 22lr because its intended role was plinking. if i could go back in time and shop for a “one rifle for survival” piece i would choose the 22wmr. or have bought both, haha. cheaper, smaller rimfire ammo means i can buy, stash, carry and practice more. i’m no hunter but ethical game kills won’t be a primary worry in a true survival situation.
if i didn’t have a henry 22lr, then my default choice would be “the old stand-by” ruger 10/22. if i were going out to buy any one new survival rifle now it would be a 9mm carbine. my 2nd son has a sweet keltec sub2000 in his gun-friendly locale but a ruger pcc would be fine too. 9mm ammo is cheap, powerful, plentiful. a 9mm pcc is largely ok in suburban indoor shooting ranges where centerfire is disallowed.
i never got into the ar/ak scene after the army decades ago: just didn’t float my boat and i was in places where it was impossible anyway. even now i spend much time in places where rimfire rifles are largely left alone by the commissars in the state capitals.