A startup, and for that matter all organisations, have limited resources. To get customers to adopt a new behavior or a new product you need to be a lot better on a few things (let’s say 10x). To achieve that requires an intense focus. This means there is limited time to do everything else, so it should be done but not more (let’s call it good enough).
A startup should try to do some things 10x better and most things just good enough. Figuring out which areas needs to be 10x:d and doing them really well is very difficult.
(This was inspired by a lunch discussion with Stockholm-based entrepreneur.)