Nowadays I have been working on an interesting customer project where I had to migrate windows oracle standard databases to ODA. The ODAs are X7-2M Models, running version 18.5. This version is coming with Red Hat Enterprise Linx 6.10 (Santiago). Both windows databases and target ODA databases are running PSU 22.214.171.124.190115. But this would definitively also be working for oracle 12c and oracle 18c databases. The databases are licensed with Standard Edition, so migrating through data guard was not possible.