I'm afraid you're missing the people Sandstorm is targeted at. People who do want a server, and a variety of services on that server, and the ability to move th

I'm afraid you're missing the people Sandstorm is targeted at. People who do want a server, and a variety of services on that server, and the ability to move the server to a hoster or local metal, but have no desire, and thanks to Sandstorm no need, to acquire the skills you are referring to. People for which a server is in support of their workflows, not a goal in itself. You're right, a Dockerized alternative might be as good or better. But until such a platform exists (I do not count Cloudron because it's closed source now), it is not viable for the people Sandstorm is targeting.