Sad to here sandstorm.io didn't make it into a viable business for you. I can only imagine just how much energy went into it (and hopefully continues to go). When time allows, I'd very much appreciate a reflection on the economic viability for innovative infrastructure software in general (hosted vs enterprise sales, also taking RethinkDB's demise and that of other "new stack" startups into account, etc.), and I'm su…
Of late, offerings that provide a hybrid approach to software seem to be emerging. Gravitational and Relicated are examples of toolsets for these types of modelss. Take logging as a service and the more traditional self hosted log solution. What would work best users would be one piece of software, which could run both on-premise and in the cloud on someone else's servers, or even someone else's service. On-prem, it might be managed by those who wrote it. Hosted, it might represent a segment of a larger market play for intelligent time series analytics and sold as a monthly revenue rollup.
Deploying these types of models will be interesting, but it's totally doable using some type of lightweight federation across services. Sandstorm represented a portion of the infrastructure needed to do simple deployments that felt like a hosted service. A service proving cryptocurrency payments for their APIs might be another piece of the puzzle.
I continue thinking about these new markets as new technology enables them.