Sadly oVirt has also reached EOL it seems. There hasnt been an update for it for eternities. oVirt is actually pretty nice in some aspects but yeah it has some weird bugs. Running a prod environment though is actually possible if you have enough hypervisor in a cluster then even patching runs quite smoothly. Autobalancing also works nice.
The only thing I haaateee about it is the awful one-time consoles.
The fact that Windows Server .iso's dont have the needed drivers to recognise a virtual drive is also not the best for a productive environment with many windows servers. Its possible, yes. But it brings a little headache at the beginning of setting everything up with it. After all you only need to mount em manually a few times. Only so many times, as you create a fresh VM-template for your environment. After that it isnt any hassle anymore.