@ktizo absolutely correct. He hints at that in the post, but that's another one of the criteria for when this strategy isn't appropriate. It's rare to have a strategy that is universal. Even "staying in business" is not always a correct strategy, and if you want to be successful as a business person, it's useful to know all of the tools in your arsenal.

Same thing as being a programmer. MySQL isn't the correct DB for everyone, so it helps to know when it's appropriate and when it's not.