[peterarmstrong]

Sounds good re. #2. Re, #1, we don't offer anything in terms of an interactive environment at the moment, and we probably won't do so for a long time. That seems like a full startup in itself.

Instead, we are differentiating by focusing on being the easiest way of making a course based on Markdown (since our books are already typically written in Markdown, so the conversion is simple). These courses need to have automated marking and certificates of course, but everything else (video, interactivity, etc) is either optional (like video) or not supported (like interactive exercises).

For us, the big win is on making courses which are easy to update: recording a video course takes a long time, so updating a video course regularly typically just doesn't happen...