I've often wondered, if you could create a gui app maker like this where the app itself could be exported as, say, a Rails codebase at any time. That would help

I've often wondered, if you could create a gui app maker like this where the app itself could be exported as, say, a Rails codebase at any time. That would help reassure organizations that wanted to use the service but were worried about lockin or the service shutting down.