> Let me say, though, that I absolutely respect your privacy and have no intention of looking at your data. It's as private as you want it to be. I'm also happy to put this in the TOS.

OP's issue wasn't so much privacy as it was permanency, as I read it. So using Gmail, I can rest assured that in five year's time my documents will still be around, just as they are today. Whereas with a new service, who's to say what lies in store for it? What if you pivot? What if you're acquired? Unfortunately a service like Gmail wins in this context.