^read this http://en.wikipedia.org/wiki/Capacitor_plague
You still see these capacitors to this date, mostly in cheap PSU's and motherboards. It has to be said that there are other causes for exploding caps. like if the circuit is poorly designed and there is excess current/ripple/voltage/heat going through the capacitor. Also if your power supply is poop and putting out of spec voltage to the motherboard, the caps wont likely last as long.