I still prefer a real watch – taking a peek at my wrist is easier than having to dig my phone out of my pocket, flipping open the lid of the case and turning it on. That's true both in summer (just need to lift my wrist) and winter, too (I might have to dig my watch out from underneath my jacket and gloves, but to take out my phone I'd have to take off my gloves, too, so still a more cumbersome procedure.)
Plus lock screen clocks rarely (never?) seem to come with a seconds display (even inside the full clock app I still need to flip a settings switch in order to turn the seconds display on) – while I don't necessarily need actual seconds accuracy that much, knowing whether it is xx:xx:05 or xx:xx:55 certainly does make a difference when I need to catch a train/tram/bus/… and am cutting it fine once again.
Plus lock screen clocks rarely (never?) seem to come with a seconds display (even inside the full clock app I still need to flip a settings switch in order to turn the seconds display on) – while I don't necessarily need actual seconds accuracy that much, knowing whether it is xx:xx:05 or xx:xx:55 certainly does make a difference when I need to catch a train/tram/bus/… and am cutting it fine once again.