37 Signals has many technical people and can afford to de-k8s. But K8s is designed for a totally different use case, for large corps where there are most non IT staff but where IT resources and standards need to be managed in a more central way. Most standard banks or large companies do not want to roll this stuff by hand, they care about STANDARDS!
That's the thing with technology though, it goes mainstream as adoption grows. RoR started small at 37Signals and eventually became a standard. MSRK might yet be one, there's no telling right now.
