Nothing I'm aware of, no, and the official language says unlimited. What sort of numbers do you have in mind? I don't know if Zotero would balk at thousands of groups by a single user. They might. Dozens of groups are definitely not a problem, on the other hand.
What sort of numbers do you have in mind? I don't know if Zotero would balk at thousands of groups by a single user. They might.
Dozens of groups are definitely not a problem, on the other hand.