The Lifespan of an LP?

Early Stones recording quality on original Decca doesn't suck.  I wish I had bought them all, as the Stones had turned to c**p by 1975 (46 years of c**p from these geriatrics and counting).
My copy of 'Aftermath' still sounds great after 55 years and there is ~30 minutes of music crammed onto each side.  I must have played it quite a bit as well.

My original mono 'Blonde on Blonde' did wear out a long time ago but I was playing it on my father's primitive Collaro that set tracking weight with a spring and must have been running at 5 grammes or something.  You will know if they wear out; there was extraneous white noise.

What’s the opinion of “Last” record preservative?

Vinyl record is the best media format in the last 100 years.

Micro Groove records are the best, what is the reason to ask about lifespan if amazing records from the 50’s, 60’s, 70’s ... can be found in MINT condition or even sealed? Vintage records are the best sounding records, and believe me, they will last longer that all of us!

Used records from the 70’s are still amazing, they are 50 y.o. , so what ? 
Buy yourself a cartridge with advanced stylus profile and record wear will be minimum. 

No simple answer for this question. All depends on tt setup, pressure, adjustments factors  your way of spinning, storing and care of the records. Record’s production quality is factor too. 

I’ve bought some pretty beat up Lps and cleaned them well. When I used a micro line stylus the record sounded pretty darn good. I guess my point is that even if you “wore a record out” there are ways to access more of the groove. 
Those same records sounded siblent and distorted with an elliptical stylus.