My take:
Everything we need as far as firearms and calibers was available by 1935.
1955 if one chooses to include the .44 magnum
The .22 short is one, if not the, oldest cartridge we have, and it is still being used, and still proving itself.
i.e. Night hunting is allowed in some places for various game, and one I am familiar with is raccoon hunting, where one is restricted to .22 short.
Another aspect we responsible firearm owners have is preserving history so we can pass forward to future generations.
i.e. Velo Dog.
Last time I looked, Fiocchi still made some ammo for this firearm.
Then we have something else, one cannot put monetary value on, and that being Sentiment.
Family heirlooms or those passed down to close friends, are valuable beyond dollars and cents.
You cannot put a dollar value on memories, of people, places and things, you cannot.
Maybe it is only once a year a older firearm is carefully brought out, and one round is fired, out of memory, and respect, still these folks have that right.
We often get caught up in the latest and greatest, and wrinkle our noses at the past.
However, when there is no power, no new technology, the number two pencil, sharpened by a pocketknife , which was sharpened freehand , will still write on a scrap of paper, no matter where.
Be this up in space, in a hot and humid enviroment, or one with sub zero temps.
The old manual typewriter will still type a letter, address an envelope, and with postage stamp will still allow for communications with another.
Sometimes I wonder, if we are progressing forward or progressing backwards?