Agreed, data volumes are definitely the biggest hurdle in this scenario. Any of the cloud DAWs I've seen mostly offer basic features, and a handful of recording tracks at best.
Just checked out Ardour, looks great! Being able to work with videos and (I presume) work on additional audio and eventually mix the two audio sources back into the video is a fantastic feature.
I'm guessing this is different from a DAW? Also, cloud-based music making applications is an area I'm generally interested in, and I find it somewhat crazy that a lot of mainstream music software companies haven't stuck a foot in. I'm aware of some, like Cubase having cloud collaboration, but it's mostly blue ocean.
Amateur product designer here, I'm really interested in what you would consider to be first principles when it comes to expected appearance/behavior/functionality of a phone, especially nowadays when the "phone" part of such a device/interface is almost an afterthought.
I'm also interested to hear what you think are the shortcomings or limitations of our current idea of a (smart)phone interface.
Just checked out Ardour, looks great! Being able to work with videos and (I presume) work on additional audio and eventually mix the two audio sources back into the video is a fantastic feature.