My 2010 Prius has had two software updates. OTA would have avoided at least one trip to the dealer. (Can't remember whether I combined the first one with a physical recall fix.)
My 2013 Volt has had two software updates. OTA would have avoided one of the trips to the dealer. (The other software update was done while other recall work was being done.)
I do agree that OTA updates for all functions would be an improvement. I do not agree that OTA updates should be used as a delivery system for features that were sold but were not functional at delivery. This is not a good omen. Promise the moon, collect dollars for it, but don't deliver it at time of sale. If the whole auto industry goes that way, and consumer goods as well, it would not be an improvement.