There's a lot of places asking people to move from would be difficult, but from my familiarity with both, those might be two of the harder sells.
SLC offers certain outdoor rec opportunities the Bay can't match, and unless the requirement to move to SF comes with a big pay bump, they're effectively asking employees to uproot their lives and take a big pay cut.
Cost of living in New York is probably roughly on par, but I'm trying to imagine someone who likes the breadth/depth of cultural/rec opportunities in NYC being happy with SF and guessing it's not going to play well.