LOL
To all the "I never do motorway" people that, routinely, pop up. There is times when you have to cover 800/1000+km in a day at a decent pace/time.
You have to put some motorway in the mix. Is it gonna be fun? No. Faster? Yes.
They are also, surprisingly
, incredibly useful to skip uninteresting areas, or get faster where the "adventure" (whatever that is) really is.
But, if you wanna waste several hours riding at 20mph through non-descript rural French or Italian towns on straight roads in the middle of the flatlands on the way to your destination... to everyone its own.