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 modified.

I've been taking a look at hackmd, it kind of fulfills the role, but the pricing is a bit high for the features available.

Could be self hosted too, but to be fair I'd rather not have to maintain it.