17 year old B&O MMC3 cartridge

I have a Bang & Olufsen Beogram RX-2 TT with a MMC3 cartridge. I bought both new in 1985. I played it almost daily until 1990. However for the last 10 years it has gotten very little use. I finally have moved to a house big enough to have a music room and have set up my full system again. My question is... should I replace the cartridge? It still sounds good to me, but I don't have the best ears anymore and I quickly adjust to whatever I am listening to (good or bad). I was under the impression that a needle stylus and cartridge could last "forever." I have cleaned the stylus using Stanton Stylus Cleaner and I used the Cardas Sweep record to demagnetize the unit. I have never had the unit serviced. Any recommendations?

Thanks!