Last year solar provided about 10% of power in the Southwest, up from almost nothing 10 years ago.
The growth is accelerating. 10 years from now it will be providing 25 to 30% of power needs.
Hard to believe growth will be accelerating at the same time population growth and a greater use of electrical vehicles will place additional demands on the system. Nuclear seems the way to go.
https://www.eia.gov/state/?sid=AZ
OTOH, reaching that magic 10% in solar/wind begins to add its own costs to maintaining a stable power system. We’ll see how well it continues to increase.