> We can do both. Google stores, backs up, secures, and generally ensures your data is safe, and you can click a button to download it all if you think you can do any of that better.

This is exactly the right solution, and credit to Google for providing it.

> This is probably too hard to ask every company to do the same, as it would exclude smaller companies who don't have the resources (this takes a lot of time and development!).

I'm surprised you say that; it doesn't seem to me that 'dump this user's dataset to JSON/XML/whatever' should be very hard to do. Admittedly I've never worked on anything at Google scale. What am I missing?