Why did you rush to publicly demonstrate your lack of knowledge about the Prius when you could have remained anonymous and kept your secret?
I’ve been driving a Prius since 2006. I traded up to the latest generation Prius last year. I get anywhere between 50 and 60 mpg on regular gas at consistent highway speeds of 65 to 70 mph and have plenty of reserve power (using the electric motor and gas engine combined) to get it over 80 when needed. Going up hills at 65 to 75 is no strain at all although the mpg will drop briefly into the mid 40’s. I don’t defer to 18 wheelers because I can’t keep up with them; I do it because I know what they have to do to make a living and I don’t want to make it any harder on them than it already is.
I guess all you Prius drivers like the scenery so you go up hills at 35 MPH.
When an 18 wheeler has to slow down behind you while other traffic clears, it takes a long time and distance for them to pass, but they do that.
If you calculate the cost per mile for running a Prius, it is more than my motorhome. Also you have to enjoy the sagebrush on the hills around you.