From what I’ve read here on the forum over many years, an important factor in oil change mileage and time intervals is typical use of the car.
Prime example, most of my driving is considered severe use on the engine because I’m a low annual mileage driver with the majority of my driving being short distance with multiple stop and restart cycles. I may drive only 7 to 15 miles total but make stops at three to five lications such as grocery store, library, veterinarian.
So I maintain all service on my car at the extreme use recommendations; oil changes, transmission service, etc.
I also make a point of taking the buggy for an extended spin, including at highway speeds, once a week and checking the oil dipstick every week or two weeks at the longest.
And since my urban driving from stoplight to stoplight has the transmission shifting up and down through gears far more than would mostly highway driving, again I make sure to adhere to tranny service intervals the owner’s manual stipulates for extreme use.
Further, I expect to get moderately shorter battery life and possibly shorter life of the starter than normal.
It all gets back to reading the owner’s manual for your particular vehicle and noting what is or isn’t considered average versus extreme use and adhering to the applicable service recommendations therein.