Hello Hirama666
You surely have seen this in the WHAT_NEW.md file "New in 11.7" section:
Limit SQL result for List: Improve performance for lists > 1000 results (e.g., schools having more than 1000 students)
Basically nothing has changed in terms of student limits (unlimited).
The only thing which has changed is in terms of performance.
Before 11.7, if you search students with no parameters for a school having more than 1000 students, RosarioSIS would get all the students. So if your school had 100,000 students, it would get 100,000 students from the database (provided the server can handle such a request...), then display 1000.
Now, in 11.7, if your school has 100,000 students, it will limit the SQL request to 1000. So it will be much faster.