[Flenser]

I'm confused, why would they be working on React and SpacePen? Don't they do (roughly) the same job?

[feifan]

React is defined by its declarative nature (for ease of coding) and virtual DOM (for performance). Not sure if SpacePen does the same, but at a first glance of the documentation I'm not seeing anything along those lines…

[dangoor]

I have a feeling that started out looking at React but opted to go with SpacePen for some reason.

[genexp]

The editor will be collaborative. It's github.