I'd also like to add that built-in Dropbox sync feature would be really appreciated by a lot of people.
There's a huge gap between people comfortable with every python script and API and those who just want to write some applet to cater to everyday automation need. I am the latter and I just can't find myself spending extra energy and attention on infrastructure.
So @omz if you're reading this, please consider adding this feature to Pythonista (I've been using Sync features in Editorial and it works like a charm).