If you move to Phoenix now and plan to live in your house for 30 years, then you are going to have a bad time because Phoenix will be unlivable if there aren’t drastic measures put in place. 118 is the ceiling now. Not the ceiling forever.
"Arizona already averages more than 50 dangerous heat days a year, the second highest in the nation. By 2050, Arizona is projected to see almost 80 such days a year."
From 50 days to 80 is the difference between good and bad place to live? No. This is just handwaving nonsense. Not every worsening is a showstopper.