IIRC some of the same people that designed SLC designed Phoenix. I am always in awe of the greater Phoenix loop highway system. SLC never had anything like that planned, and it is too late now. With the greater SLC area, and greater ST George area (where the majority of Utah residents reside, have simply become "California suburbs".
Scottsdale AZ is an excellent example of build the infrastructure before allowing the building of homes. This never happened anywhere in the greater SLC area. Great density growth in the greater SLC area, but a new mentality of "not in my backyard", prevents much needed infrastructure to ever be built- exact same problem for years in California.
The great Phoenix area has hundreds of awesome and diverse restaurants to dine at. In the greater SLC area, Chick fil A is by far the best restaurant, with the food court at COSTCO being a distant second. Yes, that is how bad dining is in the greater SLC area. Service industry employees (restaurant/ hospitality) can figure out a way to "make it" in the great Phoenix area, and in California. That is not the case in the greater SLC area. The result is major constraints on eating out in the great SLC area. Heck, even Culvers which is known for decent fast food and clean restaurants, is a disaster as a restaurant in the greater SLC area.
Of note, my Wife loves the Utah terrain, as do I. Over the past six months, I regularly apply for jobs in Utah (three this month, two last month), but I never apply for jobs in the greater SLC area. Unless one needs to move to the greater SLC area, I struggle to find a net win for moving there. It is much easier to find a net win for moving to California than the greater SLC area.