+1 here too for Word integration.
Like many others, I acknowledge Word is clunky and frustrating as hell, preferring to write text in Ulysses.
However, final copy is done in Word. You can write an undergrad thesis in Google Docs, but not a PhD thesis.
Then there's the issue of supervisors, collegues, journal editors etc who are all pretty much using Word.
Also +1 for OneDrive integration. This seems like a no brainer to me. Universities that are giving students and staff Office 365, and most of them are in the UK, are also giving a large OneDrive space. Private subscribers to Word are also getting 1 TB of Onedrive space. Therefore, if someone is going to use Paperpile for Word then there is little need for them to have Google storage.