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
Your great grandchildren will be listening to them. You can’t wear out a record. 
Okay, Whart is 100% correct.  Inna is wrong!   Sorry, the vinyl record, if of good quality or near 100% virgin vinyl, is an elastic medium.  Once played, it requires about 24 hour rest period prior to returning to it's original shape.  Hence, I have LPs that I have played 100+ times which sound as good (or better with upgraded room and electronics) as long as I treat the record with care. 

I have 28,500 LPs.  The last three collections I purchased include120 LPs from a guy who only bought 25¢ to $1 LPs, often damaged, always used, 2500 LPs from a guy who took great care of his LPs but also often purchased used/abused LPs, and 800 LPs from a guy (major record/CD producer) who had 200,000+ LPs but didn't discern condition (sometimes perfect, sometimes dreadful, mostly used).  So, buying collections or parts thereof are not so full proof.   Oh yes 3 years ago I purchased an opera & classical LP collection of 1200 LPs which were in mint condition.  The owner was fastidious and did not play them very often.  That's the quality of a collection everyone wants.

Also, cleanliness of the stylus, condition of the stylus and turntable set up is paramount to maintaining one's collection.  
Usually after about 20 plays or so I start hearing some small pops. They are still negligible. Maybe after 50 or so, the play noise is readily noticeable, and that’s the time for ultrasonic cleaning. After cleaning, it gets a little bit better, but the small pops do not completely go away, which means the damage is permanently done. However, I would still rate those records as Mint- or VG+++.

The damage is mostly due to badly setup cartridges, old/damaged cartridges, and playing dirty/damaged records. So, if your cartridge set up is near perfect and if you clean records each time you play with needles in good condition, the record will remain in VG+ condition after hundreds of play.
You don’t have to clean each time, it’s audiophiles craze. Cleaning is for dirty records (very dirty). Once they are clean you need carbon fiber brush (before each play). 


If you can hear any degradation in sound quality after 50 times then throw away your worn cartridge or stylus. It’s impossible with a good cartridge (stylus). 

Don’t like the nature of vinyl? Stick to your CDs or files (they will die before your vinyl for sure). 
I don't do ultrasonic clean or spin clean every time. 
I do carbon fiber brush clean each play.
However, after 50 times or so play after a few years without spin/ultrasonic clean, I start hearing more pops. With a regular brush clean I can easily see tiny dusts entrenched in record groove. After ultrasonic clean, the record plays with less pops, and usually sound better.
There is a chance that the records were damaged due to misalignment, because sometimes the cartridge force changes and need readjustment.

I purchased a newly retipped Ortofon MC20 super a few months ago, and I still hear pops on those new albums I purchased several years ago. I have about 10 cartridges used in rotation with four arms, but maybe I need another brand new cartridge to experiment with. 
By the way, even after over 50 times of play, the sound quality remains almost the same. Only a few more small pops. The fact though is, every time a record is played, the record wears out, however small may it be, and it will be noticeable sooner or later depending upon how the record is cared and the turntable is set up.