Your original complaint was the lack of a "miniflare", i.e. a simulator for local development purposes. But you can run Sandstorm itself locally and there are in fact tools to streamline the process of doing app development using a local Sandstorm server.

Now you seem to be arguing something about how running Sandstorm locally is too much work for end users, who would prefer to use the hosted version? But I thought we were talking about app developers. End users don't need a "miniflare".