Does chocolate go bad with age?

I'm curious to know, does chocolate really go bad with age? I've heard that chocolate can last for quite some time, but I'm not sure if that's true or not. I mean, I've seen old chocolate bars that look and taste perfectly fine, but I'm wondering if there's a certain point where the quality starts to deteriorate. And if so, what are the signs that it's gone bad? Is it just a matter of taste, or are there other factors to consider? I'd love to hear your thoughts on this topic.