It was an ambitious project, and we feel that it has not
lived up to expectations. Rather than having a public project
that does not meet HashiCorp standards, we have decided to
close source the project so we can rethink its design and
implementation. The source code is still available for
download, but Otto will no longer be actively maintained or
supported.
It looks like this is the successor to Otto, just with a bit of a different architecture.The thing I'm worried about in terms of considering trying/adopting it for any project is whether this will suffer the same fate, if it's not as successful as Hashicorp hopes. I don't want to learn new tools that give a small increase in efficiency if I don't have a guaranteed return on that effort and some reasonable confidence using that tool will help me in other areas too.
Especially if the code behind the thing has the risk of going closed-source... it's kind of the Google problem (http://killedbygoogle.com), and I really hope Hashicorp can avoid that (which they have, as they continue to support well-used even if not-flashy-anymore tools like Vagrant).