I don't live in Utah but spent quite a bit of time in SLC in the 90s (part of a due diligence team checking on a potential merger of the Cambridge-based company I worked for, and a SLC/Provo based one). I was focused on technology but had quite a few conversations with people who lived there about how it was living there.

The primary comment I got from non-LDS ("Mormon") people is that the folks in LDS (most everyone in SLC / Provo) wouldn't let their kids play - or even really interact much - with the kids of the people I was talking with.

Seemed like a fine place to live without children, with the caveat that SLC air is problematic (mountains make a big bowl open towards Salt Lake - and industry - google "air pollution from dry Salt Lake" for details. It had plenty of water when I was there — but it’s currently going to zero)

It's a big state. there are places where there isn't a LDS majority like Park city or Moab.

FWIW, I happened to be in Moab on a Halloween; there were amazingly large swarms of children out getting a sugar fix. Also in Moab, don’t miss the beer named for a local state park (Dead Horse Point). Motto: "You can’t beat a dead horse!". :-)

Also, don’t miss that park, particularly if you’re a photographer.