Dropbox is still superior IMO. I have a Office365 subscription but OneDrive can make a huge a mess with default settings if you aren't careful when you set it up on anything but a new machine. It's just less slick overall - plus I really want first class Linux support.

I don't want to pay for two file storage systems though and the 3 host limit on Dropbox is a shame. Without it they'd be all but guaranteed to lock me in and I would (gladly) start paying again in a year or so for more space.

Instead I switched to syncthing, which is great but not as nice.