Everyone is constantly pushing you to make your investor pitch shorter, get rid of slides. And after a number of feedback rounds you are left with a very short deck: the summary bullets, an about page, team, IDC/Gartner market forecast, milestones, use of proceeds, for example.
These charts are all very generic, and you will find them in every investor pitch. The content is obviously important, but you have chopped out the charts that tell the story of your company. Why it was so hard until 2017 to tackle a particular issue, and why your company is so brilliant at doing it.
The tell tale sign of a deck that is too short is that you are not using it when presenting. You know your story inside out, so on page 1, you give the the presentation without using any slides, then you quickly click through the slides with the technical company information.
This works great when you are in the room, it does not work at all when you email the deck. Think about the MVP: minimal viable presentation.
Image via WikiPedia