Docker Swarm doesn't support multiple users and there is no remote-accessible API. Nomad doesn't implement network policy (Nomad Connect sidecars may be an option but sidecars bring new problems). Just learn K8S, Helm, Terraform & Terragrunt properly. Use proper tools (k9s, Loki, wrapper scripts around kubectl). Stop finding excuses for not using K8S. Stop putting proxies everywhere (that Istio/servicemesh bull*hit) and use Cilium CNI instead.