This.

GP comment was downvoted into oblivion, but he had a point. Compose (at least, v3/v3.1) is a reasonably simple system, that can describe a fairly complex setup. Kubernetes has a lot of complexity to it. And the question "why do I need it, if there are simpler options?" is left unanswered.

Until you end up working around various shortcomings and then suddenly your yaml files are a mess and almost a framework in themselves.

The Kubernetes files really arent that complex