There's been a few threads about this general subject, but most have concentrated on Classic in particular. I think it's worth discussing migration of ActiveMQ as a whole and diving a bit deeper into the details of why a migration makes (or doesn't make) sense and what the challenges may be.
To this end I've put together this document [1]. I hope it will be of service to the community as we consider this option. Justin [1] https://github.com/jbertram/activemq-website/wiki/Apache-ActiveMQ-GitHub-Issues-Migration-Review