Have you read the conditions to qualify for "Severe Driving"? It's crazy, and doesn't provide any guidance as to what percentage of your driving has to be in these conditions.
* Driving in heavy traffic or stop and go conditions
* Driving in areas using salt, or in very cold weather.
* Driving on rough, dusty, muddy or unpaved roads
* Driving uphill or downhill



These are just some of the conditions that qualify as severe according to my 2019 owner's manual.
So pretty much everyone who drives in heavy traffic, or in areas that get snow in the winter, or live in a hilly or mountainous area, are supposed to follow the Severe maintenance schedule!? That's like half the US.
Meanwhile, my local dealer doesn't even use a full synthetic oil (which is why I do my own maintenance). Go figure.
Also, gotta love their guidance for several items like spark plugs changes under severe conditions. It just says "More Frequently"

