Yes why not. I don't know about the supportability, but very rarely we raise a ticket for OCUM issues. It's something you can rebuild quickly so that shouldn't be a concern.
We had OCUM 7.3 (end-of-life) running for long, and then we installed latest 9.6 and for sometime we kept both running b'cos all the alerting were setup for the old and it was doing its job. Later we turned off alerting from 7.3 and activated alerting on 9.6 and powered-down that VM.