Currently when 2 editors of a library work on the same library at the same time one will lose their work in favour of the other if the other publishes first.
This means only one editor can work on a library in a team.
Within a team many editors need to be able to work on a library at the same time.
To achieve this the system needs proper version control. This includes the follwoing
Branching
Conflict resolution
Merging
I've never come across a team account that doesnt have this fearture tbh.