Yeah, that could absolutely be said for basically any website or app idea. And I totally get it. But there's sometimes a nice feeling to officially see your accomplishments logged somewhere. I focused on the ease-of-use -- click on the room, click one of the things in the room (that it already knows about from past interactions), and then click what you did to that thing (again, knowing what you've done to it in the past). It was a fun challenge.
In terms of data portability, one of the next features I'm working on is letting everyone easily download all of their data -- as JSON, XLSX, and CSV. Then you can leave whenever you choose.