I have to ask an obvious question: Whats the point of overclocking a quad core processor? I understand back in the day people overclocked Pentium 3 processors and stuff but why now? (I used to overclock my Pentium 3 500mhz processor

)
I don't overclock my AthlonXP because I can't stand the loud fans and with hot summers where I live, it is already tough to keep a computer cool.
Imagine 4x3ghz processors (quad core), so 12ghz, why OC for more? Is it really worth the trouble? By trouble I mean the problems that seem to pop up after a system has been overcloked. Maybe when the room is hotter than normal, or you have a new piece of software that puts more stress on your PC and it freezes or something.
So this is my opinion, and now that I asked my question, can somebody give me some insight as to why overclocking is still a big thing? (or is it?) I didn't mean to offend by this post and I am sorry if I did. A detailed response would be ideal. (considering cost for various things related to coverclocking, better cooling parts, noise, and increased energy usage)
Keep in mind I am not against overclockers, and back in my day I was one. If I were to look 5 or 10 years ahead, and if there was a 50ghz processor, would people try to overclock it to 55ghz? And if so, why?
Content contained in my posts is for informational purposes only and is used at your own risk.