@Movion it isn’t so much as “kubernets is only for Enterprise”… you absolutely can run Pro or free on k8s. The issue is scaling horizontally requires Enterprise. If you scale out your Mattermost deployment with a free or Pro subscription, funny / bad things can happen because those nodes cannot talk to each other to maintain database integrity.
If you don’t intend to scale, you’re fine. But since the whole point of k8s is scalability, I tend to talk about this very emphatically!