Zawinski: I know it's kind of a cliché but it comes back to worse is better. If you spend the time to build the perfect framework that's going to do what you want and that's going to carry you from release 1.0 through release 5.0 and everything's going to be great; well guess what: release 1.0 is going to take you three years to ship and your competitor is going to ship their 1.0 in six months and now you're out of the game. You never shipped your 1.0 because someone else ate your lunch.

Your competitor's six-month 1.0 has crap code and they're going to have to rewrite it in two years but, guess what: they can rewrite it because you don't have a job anymore.