I love Kubernetes, but it's still a big leap from docker-compose to k8s, and swarm filled that niche admirably. I'm still in that niche -- k8s is overkill for every one of my projects -- but k3s is pretty lightweight, easy to install, and there's a lot of great tooling for k8s I can use with it. Still wish there were something as simple as "docker-compose plus a couple bits" that was swarm mode -- I'm drowning in YAML files!