While I won’t turn the motor off at every stop light, some are ridiculously long. When I visit my son in Wilmington, NC I notice how long some of the lights take to turn. If I lived in Wilmington NC I likely would kill the motor on some known long lights.
This seems to be the case here, a 1 min. 20 sec. light seems like a long time. My car restarts very quickly and I won’t hold up the traffic behind me so in this case I go along with the OP and kill the motor.
It definately saves thimble full of gas, but it adds up if done by lots of cars. I haven’t replaced a starter in a long time so I’d risk the wear and tear on the starter to save some gas.
Today I turned my car off at the drive up bank window, so it is something I’ll probably be doing more often in the future.