You'll get more support on a hard, important, project than a derivative one.

A small communication breakdown is enough for everyone to be working on slightly different things. And then you loose focus.

To get the very best people- they have a lot of great options, and so it can easily take a year to recruit someone.

The other piece besides focus for execution is intensity. Startups only work at a fairly intense level.

Press releases are easier to write than code, and that is still easier than making a great product.

Execution gets divided into two key questions: 1) can you figure out what to do and 2) can you get it done.

It takes years and years, usually a decade, to create a great startup.