As far as the Hybrid goes, it depends on how often the engine runs. When I had my Volt, the engine might run once every 6 months or so, maybe longer. Sometimes it would go so long without running, that it had to enter "fuel maintenance mode", which used up some fuel whether it needed to or not, so that fresh stuff could be put in, and to lubricate various parts of the engine.
The operators manual stated that premium fuel had the benefit from lasting longer in storage (the fuel tank) due to more additives and higher quality overall. It also allowed for better fuel economy for the reasons stated in above posts.