Most classic everything is no longer available. This is a function of time and the general human desire to make new stuff. Otherwise antiques wouldn't really be special.

If we want our stuff more permanent, this will be a change from the past that we need to specifically enact. Otherwise it's just people being subtly out-of-touch with how time will eventually destroy not just them, but their works too. Only the influences it left behind echo into the future, for as long as our art does anyway.