An excellent point. In fact, it is stated often that ZeroCater - a YC graduate - began as an Excel spreadsheet. (<a href="http:&#x2F;&#x2F;thehustle.co&#x2F;stories&#x2F;zerocater&#x2F;" rel="nofollow">http:&#x2F;&#x2F;thehustle.co&#x2F;stories&#x2F;zerocater&#x2F;</a>)