Bootstrap 2.2.0 released
I'm mainly a backend guy but do some frontend work from time to time.  I keep seeing all this talk about a dozen different CSS "frameworks", and I just don't get it.  Can someone explain to me what the purpose of these things is?  Bootstrap's site for example doesn't even try to tell me what I would want it for, it just says I want it "because its for nerds" (do I have to dress in faux-nerd chic and live in the valley to use it?) and that it uses grids (that's the opposite of a selling point guys).From looking at the code, all I see is a bunch of boilerplate CSS that seems to deliberately work against the nature of CSS (protip: the C stands for cascading), and is very brittle and tied to specific classes and markup rather than using selectors to be general and reusable.  Is that really all it is, just a "I'm too lazy to design my site, so I'll just use twitter's design"?  Perhaps it is just the word "framework" throwing me off since it doesn't appear to be a framework in any way?  I know this is going to sound needlessly critical to some people, but I am expressing genuine confusion here, I really don't understand what I am supposed to use this for, or how it would help me in any way.