BIRT reporting is very important for many of our users. Withdrawing support for BIRT would create a serious problem for them, and would be perceived by clients as a breach of trust. Tech support reports that support will continue only if the BP community expresses interest.

Other clients have also expressed interest in starting to use BIRT reports, and it is a tool that is useful for us to fulfill functional requirements (e.g., providing a presentable Lease Invoice, not the embarrassingly poor one that uses Archibus native reporting.)

Archibus Help announced that "BIRT [4.8] reporting will be removed in V.2022.03, due to an identified security issue that requires Java 11 to remediate.​" https://help.archibus.com/system/sysman.htm#BIRT/BIRT_Overview.htm
However, on March 21 BIRT 4.9 was released that removes the security issue. Upgrading to 4.9 may be undertaken by Archibus, and if so should be back ported to earlier Archibus versions.