Productivity
Have you reached a point in your application where you want to rewrite some portion of the code, change a public API or even switch to one of the third party components that are widely used today? It's very likely that you've bumped into this wall like most of the developers out there and you know that usually a comprehensive evaluation of the pros and cons of the switch is required to ensure the same improvement can't be achieved with some small tweaks in the existing solution. Either way, you might end up fighting with strange issues and spending
tons of time...