It's not a k8s replacement. It's for the small dev team with no k8s experience. For people that might not use Docker Swarm because they see it's a pretty dead project. For people who think "everyone uses k8s", so we should, too.

I need to run on-prem, so managed k8s is not an option. Experts tells me I should have 2 FTE to run k8s, which I don't have. k8s has so many components, how should I debug that in case of issues without k8s experience? k8s APIs change continuously, how should I manage that without k8s experience?

It's not a k8s replacement. But I do see a sweet spot for such a solution. We still run Docker Swarm on 5 servers, no hyperscalers, no API changes expected ;-)

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