I seem to remember Cocoon was using continuations, and there was a framework for ruby inspired by seaside but I don't know what happened to it. To add to what

I seem to remember Cocoon was using continuations, and there was a framework for ruby inspired by seaside but I don't know what happened to it. To add to what you wrote, the elevator pitch of Seaside and the likes is that we basically write web pages as a sea of GOTO statements and global state, the use of continuations allows us to get to the "structured programming and function calls" level.