Just to give my perspective, I read it totally differently. The impressive part to me was the F# core doing spreadsheety things, and the rest felt like incident

Just to give my perspective, I read it totally differently. The impressive part to me was the F# core doing spreadsheety things, and the rest felt like incidental view logic that had to be covered for the sake of completeness but wasn't really important. I thought the fact that the demo is embedded right in the page was incredibly cool because it let you poke the logic interactively, but I wasn't too concerned with how it was done.