[mattmanser]

You missed his point.

It doesn't actually work well. It doesn't do basic stuff, which makes it entirely unusable. Like you can't move up/down/left/right using the arrow keys. You can't save it. It crashes if you make basic mistakes.

The 80% of perceived functionality is that it looks like a spreadsheet app and actually does some basic calculations.

It actually does about 5% of what you'd expect even the most basic of spreadsheets to do. And all the polish of even the most basic functionality is missing, which is what takes most of the time.

Which is why you should always avoid putting a pretty looking but barely functional mockup in front of the pointy hairs. They then think it's almost done.

[kamjam]

Agree with your last point totally.

But 30 lines of code, what do you expect? Now imagine jQuery type library with a community of developers and you get... Google Docs :-p

[gaius]

I'd say this is to Excel as MongoDB is to any real database.