> "I'll just follow my routine and charge it by my bedside every night". Even if you don't follow the routine and forget about charging it, it recharges relatively quickly.

That's if you can charge it. I (and a couple of friends) routinely sleep out of our own home for a couple or three days on a whim. We can easily come by Lightning or micro-USB chargers if need be but we'd be hard pressed to find a smartwatch charger†, which means a dead watch soon enough.

† Qi largely isn't popular enough, and even then if it were an Apple Watch it's been walled into only working with Apple's chargers.