Because Koha makes direct SQL report authoring available, reports can be designed with any system data. During the transition period, PALNI staff and our hosting provider (Equinox) will work on development of ready-to-run templates for most commonly used reports.
The Koha community maintains a library of SQL scripts. Some scripts can be directly copied and run; others may need some slight modifications based on local settings and processes. https://wiki.koha-community.org/wiki/SQL_Reports_Library