Unfortunately, there's also bad pollution. The valley makes SLC prone to pollution and especially inversion layers in the winter and ozone in summer. You'd expect mountain air and you get that sometimes, but other times it's as bad as or worse than major cities elsewhere.
One of the downsides of being a red state is less will to address environmental concerns like this. It's been slowly getting better due to car emissions standards (which Utah has no active involvement in), but there's still a lot of pollution sources that need addressing. There's an active refinery in town, at least one big mine across the valley, tons of trucks and trains passing through the region, and the airport is being expanded.
Given the air is also extremely dry in the winter, I can't see myself moving there, despite it hitting a lot of my criteria for places to live. Were they to get their environmental house in order I'd say it's one of the best places to live. I hope someday SLC realizes its just not geographically destined to be an industrial hub, and makes responsible choices to shift away from that.
http://www.stateoftheair.org/city-rankings/states/utah/salt-...
https://en.wikipedia.org/wiki/Air_quality_in_Utah
https://www.sltrib.com/news/environment/2020/01/28/salt-lake...