Fiat-Chrysler is the same. They have OTA and update via USB. There is no option to request/push the OTA, you just have to wait for it or put in a USB.
I would be interested doing myself if they made it available on the user's portal. That would be super, but I somehow think that would not happen so I'd be forced to go into the dealer for any meaningful software upgrades.
One thing I wish they improve is to better manage automatic braking with SCC. To me, the SCC applies the brake much later than I would normally apply. It's almost like it's waiting till the last minute before the application of the brake. As a result, the 'Ride comes to an abrupt stop at times. I know you said you don't use SCC, may be this is a good reason no to.