In my car, I basically never change the A/C. My dad used to have a same-vintage car for a while, but a different make, and it absolutely needed adjustment depending on whether the sun was shining on you or not, and possibly other parameters. They both had "automatic" A/C.

Now these cars are ~20 years old, maybe things have improved. I haven't ridden in my dad's ~2yo car for any long stretch during the summer to compare.