My plugin caches some data that allows it to easily maintain information between application runs. The default is for it to be off, but it can be switched on. I saw when I looked at the code that you were using localforage, but I didn't know if I could count on it being there if I wasn't actually using the locaol storage plugin. So I wrote my own access layer to indexdb using promises, which my plugin currently uses.
Just thought it was an idea, but I can understand your points.