I can see some people here claiming this is old (it is) and that it's a repost (it is), but I'll still vote this up, because especially now with people yelling

I can see some people here claiming this is old (it is) and that it's a repost (it is), but I'll still vote this up, because especially now with people yelling "scaling! scaling!" all over the place, I can't imagine a more fitting time for developers to read this.