Ball joints can last for a long time or only a few years. If they have grease fittings and are greased, they should last almost forever as long as the boots remain intact.

My 1974 Porsche has the original ball joints and they are still tight. The boots are intact.

My 1993 Geo has a bad one but the boot is torn and the grease gets out and dirt gets in. the joint will need replacement.

Basically ball joints are random luck. If something in the road tears the boot, the joint is a time bomb ticking fast. If the boot stays intact it may well last the life of the car.

Anything with a boot will likely last as long as the boot is intact and not leaking. Grease fitting help a lot. No grease fitting, consider a grease needle. Rubber bushings...they dry out and tear. Poly bushings are a big improvement but a little harsher & squeaky.

Silicon spray is your delicerance. Use liberally on all rubber, plastic and vinyl. Ball joint, CV & tie rod boots love the stuff. Keeps them from drying out. Another casue of boot failure.