A lot of trucking companies are switching their fleets over to automated transmissions because they require less maintenance than manual transmissions with clutches, but an "automatic" transmission in a semi truck is NOT like the one you have in your car. I drove a truck with an automated transmission for the last three years before I retired from driving. I HATED IT! I'll take a good ol' 13 speed manual trans any day!
I'm a retired long haul trucker (CDL-A with HazMat, Tanker, Doubles and TWIC)