Lots of applications are really full featured databases with a simplifying user interface to suit a particular use case. I think a good Todo list could and shou

Lots of applications are really full featured databases with a simplifying user interface to suit a particular use case. I think a good Todo list could and should be the same - with both a simple Todo use case supported while also able to become more full featured (I would like something able to handle "getting things done" style planning. But why not be able to scale to full-on project management? It could be made pluggable.)