[alexro]

It really depends on the case at hands, sometimes it's more practical to scale up, especially if there is no indefinite grows anticipated.

http://www.codinghorror.com/blog/2009/06/scaling-up-vs-scali...

[eckyptang]

That's hardly a great reference, especially when he immediately shot himself by not checking vendor limits...

http://www.codinghorror.com/blog/2009/07/oh-you-wanted-aweso...

[alexro]

The general point still stands - scaling up is often a preferred solution and life proves it every day. Not so many companies enjoy facebook style grows, and even aren't viral at all.