I was wondering what kind of programmer would benefit from learning assembly? I know that someone is going to reply "everybody" and while this does make sense becuase it's lends a hand to writing tighter, cleaner code in another language, because you know what is really going on under the covers. It seems (to the best of my knowledge) that assembly is used mainly for games where speed and file size is an issue. Ive seen examples on reading/writing files but that is about it.

So the question is, should i learn assembly just to give me a better understanding of what is going on "under the covers" so to speak. Or should i learn assembly in the hopes of writing actual code?