NOS cartridges

A stylus last about 2000-3000 hours according to the makers.That said,if parts other than moving parts age too,why do they design and supply replacement styli?To rip us off?If you take 2500 hours and divide it by 18 months,it would take at least 4.5 hours of listening everyday to wear it out.Is it their intention to rip us off,(I doubt it)or do they still not know you shouldn't put a new stylus in your over 18 month old cartridge?Just curious.♫

Wouldn't it be nice if they could design a cost effective MC cartridge with user a replaceable stylus?All those little extra connections plus added mass that would be needed to do that would ruin the MC benefit.It sure would save us from shipping them back to the pro's though.♫

Could somebody ask Laura where to find the expiration date?

Could somebody please find Laura?
I haven't seen an article or heard about her in nearly 10 years or so.
Perhaps she reached her expiration date?

Hifitime, there are such cartridges.
for example Empire MC-5. Extremely good cartridge.