A Microsoft platform for building enterprise-level data integration and data transformations solutions.
I spoke with my friends and one noted that SSISDB is basically a log file for SSIS, and if there is a heavy traffic, you don't want readers blocking writers. He also thought that ADR could be beneficial for SSISDB.
For ReportServer, the comment was that the database is not busy, so he could not see that it would matter very much in any direction.