I strongly believe these are almost there. The interface is what sucks with notebooks. Code should be hidden, cells should be smaller so you can pack a lot more

I strongly believe these are almost there. The interface is what sucks with notebooks. Code should be hidden, cells should be smaller so you can pack a lot more info in them. 2D organization of data is a lot more effective that a long 1D list of things. I believe OnservableHQ has a good shot at it.