This just make me want to make my own little Arduino device. I bet it would be more fun than buying a thing someone else made that I don't have a real use for.
Other comments mention how this was a Kickstarter that took two years to come to fruition and the supply chain is listed as the culprit. No one else has mentioned that while us backers were waiting, they sent out newsletters that detailed some of the complexities they were dealing with. Getting the case right took several iterations, and when you feel it in your hand you can tell that they took time to get it right.
You're right that one could put most of the functionality together, but not in a package that you're gonna toss in your pocket for EDC.