Apple launched a phone that couldn't MMS, couldn't have applications on it, couldn't copy and paste.
Even take Mint.com, they started out with just a pie chart and one bank - it was only afterwards they got ever so clever.
If you pick pretty much any big success story and chart the different between them when they got big and where they are now, there are massive differences.
Often a lot of the features only make sense when you're big and popular, and I think many start ups design for them prematurely.
That was my point.