This might be useful for contracts, as well. Editing points and having history, being able to comment on specific parts etc. Not 100% sure on how to solve the

This might be useful for contracts, as well. Editing points and having history, being able to comment on specific parts etc. Not 100% sure on how to solve the "legally binding" part if the other party declines digital signatures, but it'd be a good way to get the contract written and agreed on.