The main issue with a manual in heavy traffic is how heavy the clutch is and how severe the bite.
You can barely drive a classic rally car like Escort or Mini in town traffic as it takes a LOT of pressure to push the clutch and it works like a switch with VERY little slip available.
The clutch bite isn't an issue with other cars and very easy to drive BUT I've driven some cars that have had heavy clutches and can make the left knee hurt after 30 mins of stop/start. Others have been so light in operation it was unnoticable
So..... depends on the car !!!!
But for fun and control then manual is the best and less things to break
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'