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It does have a few export options but I can understand your point.

"Export" is not "sharing".

Technically, it is - however, I already acknowledged that I can see why this would be easier to collaborate.

If I export something and send it to you, then you have one and I have one. If we share it, then we both have the same one.

You could use git to track the file and share the repo. That way multiple individuals can edit one file. It is just plain text after all.

this discussion started about sharing with non-emacs and non-developers. Git is not feasible for non-developers.