Advice for a collaborative text editor (opens in new tab)

submitted by Hello, I’m looking for a simple collaborative text editor. We do have an office 365 subscription and it works, but the 10 minutes loading time every time you open a document are taking a strain on my mental sanity. We don’t need nothing too fancy, markdown support would be a plus, especially with embedded latex formulas and possibly bibfile references. The things I really need are a simple ways to add comments to text and a changes view to immediately see what a collaborator modi...