Have perfectly good pair of 1950s ish Goodyear all-weather nylons for one of my 26" Rollfasts that are supple...

And of course I've had to hack off old neglected tires of the same age to put new ones on...

Sometimes you buy vintage tires for show as they are what it would have been equipped with when new, about like any other hobbyist does.

It depends on what you are going to do. There are replica tires, I'm hearing that Goodyear is getting back into bike tires maybe?