How long should vinyl last?

I have records that I bought new over 30 years ago that still sound excellent. The key is to never play a record without cleaning it properly. This is really more important than the equipment, as long as the the equipment is good quality and working properly. And always thoroughly clean a new record before it is played. If you don't have one, I'd recommend a good wet cleaning record machine.

My experience is similar to Jependlton's: I've got scores of LPs that I bought new in the 60's and 70's that still sound great. I also recommend use of a wet-vac cleaning machine and a carbon fiber brush before *and* after each play.

I have a used record of the Mills Brothers that has a 1938 date on the jacket. It has no scratches, no hiss, no pops.
PPP must play records on a old victrola with a knitting needle. The idea that a layer of vinyl is removed with each playing is a urban tale.
I'm sure you will get very tired of hearing Sgt. Pepper way before the record wears out.

I have LPs with hundreds of plays that sound brand new. Ohers begin to display clicks and pops much sooner, no matter how well they are cared for. The answer: it depends.

I have brand new records that behaive that they're warped.
I have records over 50y.o and they're still sound brand new.
Any case if I buy records I make sure that they at least look new.