Confession time...
When I quit my industrial job to go out on my own, I was on the "screw terminal only" high horse. (Quote me... Although it is UL approved, "back-stabbing is a shortcut that I won't take")
It was fine for service & remodeling work, where I was only doing a few dozen devices. But when I began doing a small new development, by the 6th house, I realized that I couldn't compete with the other bidders unless I back-stabbed.
Well, because:
#1- My family needs food & shelter.
#2- Back-stabbing is a UL approved termination method.
#3- Thousands of homes have been built in my area over the past 20 years, and every RESIDENTIAL electrician that I ever spoke to "back-stabs".
Therefore, I often do it now, with a clear conscience.