My IDE auto-saves as you make changes, yet I still mash ctrl+s frequently. I think it's mostly games that gave me the habit though. PC gaming has always been a gauntlet.
This gave me shutters. Maybe it is some sort of manual transmission-type feeling of control, but that is terrifying to me. Something about that feeling of owning when the source file is changed.
I guess more analogous to your "save" mechanism would be my git commit.