And Deis Workflow was marked EOL later on, something like July of this year, ostensibly so those devs could devote more time to Azure and other OSS offerings.
A lot of the complexity of getting serious deployments running on Kubernetes is just neatly abstracted away by Deis, so much IMHO that now I'm not sure what to do about getting my team to take up Kubernetes without encouraging them to use Deis. To be clear, we are using Deis, but in a very limited capacity in large part because of the perceived risk associated with those yellow construction triangles[1]. (We are so lightly invested in K8S that I think we don't really have another part of the plan as of yet. The plan is to spend 6 months on ECS and not explore Kubernetes until after, can't wait to hear what news comes this week from re:invent, or if this strategy will even be realistically possible to follow once the "EKS" news hits.)
Some of us really felt like MS making this move shortly after acquiring Deis team was a bit like throwing out the baby with the bathwater, but those devs have assured us they are not just taking directions from corporate, and that they actually are going where the demand is (that there's not enough demand for Deis Workflow specifically to be strategically important for Microsoft, but there is plenty of demand for Kubernetes at-large and more Kube-native tooling around K8S issues.)
Not sure how close you've been following this story, so apologies if I'm telling you about things you already know. And I'm not one to complain about the mode of delivery that my free stuff is received in, but this change really came out of nowhere for me and has thrown a massive wrench in my own Kubernetes adoption strategy. Some of us are trying to make sure that the OSS Deis Workflow tools are not lost to bit-rot, and development of the project now continues under the name "Hephy"[2].
Also, just a minor nit, I think that although Helm was originally made by Deis, Helm[3] the package manager has not been "taken" under the Microsoft umbrella, as it was adopted and considered as a part of Kubernetes-proper before the sale of Deis.
[1]: https://github.com/deis/workflow/
[2]: https://github.com/teamhephy/workflow
[3]: https://github.com/kubernetes/helm