The Lifespan of an LP?


How many times can one play a new vinyl lp before the sound noticeably degrades? For the purpose of the exercise, assume one takes decent care of the record and has a properly set up and maintained, good quality deck and stylus. My system has been taking quantum leaps in quality over the last three years and I find myself buying more mint and near-mint vintage  records on Discogs and audiophile remastered records from MoFi etc. Thanks!
heilbron
Right, vinyl is not solid, stylus disturbs it and damages it a little, I suppose. 
The problem with vinyl is usually not out-and-out wear from too much playing. The problem is that a record needs to be treated with respect.  Don't eat fried chicken before you take a record out of the jacket to put it on.  Don't leave them out in direct sunlight to bake n' warp.  Put 'em back in the jacket after you've played 'em. If you see dust, cat hair, or sand on the surface, gently wipe it off with a clean soft cloth or dedicated record brush. Similarly, if you see schmutz on the turntable platter, clean it off.  Don't play 'em wet. Try not to zoom your tonearm sideways over the record when you're hunkering down to cue up the track you want to hear.  Don't stack them in a random pile.  Don't stack them horizontally, either.

Sure, all this stuff is pretty much common sense.  But if you're buying a used record, who knows where it's been?
Like Inna,
a Nakamichi cassette player becomes my musical source to cut down on my use of records.  I also 
Place Last record preservative on 
all new records.  Cd’s are also 
a source of my music.
When we were kids and the record would skip, someone told me to put a penny on the head shell. I'm sure that helped wear out the record! 
jnovak -- As an audiophile even back then, I'd put a dime on the head shell instead. A more expensive solution but less weight.