I suspect the reason Toyota specified 0W20 oil for cars that has the same engines that previously used 5W30 is the 0W20 gave them enough mpg gain to round it up to the next higher number. If they want to use 0W20 oil on the EPA test they have to put in the production cars.
My 2012 Camry has a maintenance reminder light that still comes on every 5000 miles. Toyota claims it is to remind you to rotate the tires. I think it is because the decision to require 0W20 oil was made too late to make changes in the car.
I have no problem with the 10,000 miles or one year oil changes, I only drive about 6000 miles a year so I change it no later than the date I changed it last year. I know I don;t have 100,000 miles left in ME. When the guy at the hardware store asks me if I want the 15 year caulk or the lifetime, I laugh and ask him jf he has any 10 year.