Record wear is directly related to the alignment of your stylus and how well your turntable tracks. If a stylus is maintained in correct alignment and your turntable tracks solidly with a relatively low tracking force, you can get thousands of plays with no degradation. It helps a lot to keep your records clean too. I have records that are thirty years old that sound like new. The bottom line is that with a good setup, you are going to get sick of the music on the record long before you wear it out.
Records were designed to be played. Here's an extreme example...
An acoustic phonograph uses a steel needle that looks like a small nail to play the record. This needle connects by means of a bar to the center of a mica diaphragm. The vibrations transmitted from the grooves make the diaphragm vibrate, and these vibrations are channeled through an airtight tube to a horn, which amplifies them. The soundbox that contains the diaphragm and needle weighs about a half a pound I would guess. Imagine the force exerted by that weight narrowed down to a needle with a three mil point. That's hundreds of pounds per square inch bearing down in a V shaped groove made of lacquer. That should be a real record chewer, right?
Well, I took a mint condition 78 and transferred it to my computer. Then I played it on my acoustic Victrola 100 times, and transferred it again. There was absolutely no difference between the two transfers. I bet I would have to play it at least 500 to 1000 times to even hear a slight difference.
If they had the ability in 1917, when my Victrola was made, to minimize record wear using that primitive technology, you can bet they had it licked by the time LPs came around in 1950.
The flip side to this is, an elliptical stylus that is out of alignment, or a diamond with a chip in it will chew into a record, creating permanent damage and distortion in as little as a single play. That's why I always recommend that anyone who gets a second hand turntable on ebay should replace either the whole cartridge or at the very least, the stylus itself. Figure that cost into your bid, because you can't assume that the stylus you are getting with it is in as good shape as the turntable itself. By the time you realize what's happening, you might have thrashed a dozen or more of your favorite records.
See ya
Steve