How well does the Nextcloud mail app perform with a large number of emails on the server?

I’ve been reading this thread and it seems that the outcome could be somewhat mixed:

However, I understand that this thread is several years old, so I was wondering if there is any updated review of Nextcloud that could shed more light on the performance of the Nextcloud app when working with a mail server with a large number of messages.

The referenced issue was resolved with one of the latest maintenance releases for mail.