A SQL Server technology that supports the creation, management, and delivery of both traditional, paper-oriented reports and interactive, web-based reports.
I think the only real way to class RDLs is by how many server‑side bits they still lean on. subreports, shared sources, custom code, multi‑srv hops. PBI drops all of that, so just count those in Report Builder and you’ll know which ones need a full rebuild. sorry, learned that the hard way.