KubeVirt
KubeVirt is easily my favourite virtualisation engine. It allows you, following the same principles as Kubernetes, to run virtual machines inside of your kubernetes cluster. It also allows you to follow the same GitOps principles that you can apply to your kubernetes cluster.
I use KubeVirt to run different kind of VM and like Proxmox, i use it to orchestrate the creation of Talos node with the use of Cluster API. It's the V2 of Weebo-SI.