I'd be interested to know if this is integrated and rebranded nanobox [0]? Or something completely from scratch?
[0]: https://nanobox.io/
We certainly took a lot of inspiration and leaned on the awesome experience of the nanobox team, but this is largely a completely different architecture.
Wasn't the Appsail nanobox? IIRC, it was planed to be DO's PaaS, so it's cancelled and then DO's PaaS is based on k8s instead?
Appsail was nanobox from what I saw, they redid it between appsail and "apps".