I have records well over 40 years old, I have always cleaned them with a Disc Washer,and before you nay say, it's done an excellent job. I now have (2) Keith Monks machines and the difference is awe inspiring. The VTL and like are not on the same level.
So with that, a good piece will last darn near forever, but-- a common paractice was to regrind the discs, and with some companies, labels and all, hence the early rise of pops and clicks, once their molded in, theres nothing you can do.
Older vinyl has less of this, the mid 70-90 vinyl is more prone to this, with the Greed factor applied.
Still the older vinyl if MIXED well, and a lot of it wasn't still kills SACD, and I mean KILLS, however I find SACD enjoyable and listenable, the old CD's were only for the car, or if there was no vinyl available.
Take care of your records and they'll take care of you.
A decent cartridge can be had for in the 125-250 range street price, which translates to 350-800 retail.
People get carried away with super vinyl rigs but still, the most important part is the cartridge, then the tone arm, and then the table, although anyone not up to competance will drag the others down. An old used Sota with a decent Sumiko arm and even the lowly Ortofon X5MC is still miles ahead of CD and you can pick those up used for less than a decent Arcam deck.
Dig out those records and clean em up.
Hey side note: Vinyl cleaning recipies.
loontoon