alt Hacker News"around" is the best way to describe it; the libvirt/virt-manager ecosystem isn't dead, but redhat killing off ovirt/rhev support drained a lot of resources out of it.
And for some bizarre reason people decided that the much less mature (both organizationally and technologically) proxmox VE is the best thing since sliced bread, so everyone who does care about linux virtualization is now trying to hammer some homelabbers' collection of perl scripts into a replacement.
It would be funny if it wasn't so sad.
Red Hat is still using and developing libvirt (though the user facing layer is Kubevirt instead of oVirt) and virt-install, and even though virt-manager is not growing new features libvirt takes backwards compatibility extremely seriously, so new libvirt works with relatively old virt-manager.