Hi Marijn, I'm curious if you've taken note of substance.io, and what you think of their composer and viewer, which similarly keeps the structure and views sepa

Hi Marijn, I'm curious if you've taken note of substance.io, and what you think of their composer and viewer, which similarly keeps the structure and views separate. I'm not related to substance.io, just someone curious about editors on the web, and so have kept track of various options. Prosemirror looks very promising.