Thing is, Nomad isn't trying to go up against K8S. It's part of the Hashicorp family of products, so if you use a couple of those, it's easy to add Nomad into the mix, or just use K8S. While other competitors have tried to out-do K8S, Hashicorp seem to try to work with the broader eco-system, which means some will just use Nomad to keep it simple, but don't need to for Hashicorp to continue working for them in other areas.