I think most probably do, but in my opinion the optimal way to use this watch is to wear all day and night and charge in the morning while you get ready. I've been doing that for 2 years with my Series 3 and I have never run out of battery.
I have a friend that does this. I think that this may conflict with Apple's goals around wearables, though. I suspect the company aims to determine life schedules and provide useful prompts through key portions of the day. Morning prep being one of them.
The watch needs to charge without taking it off the wrist--for example from using an Apple laptop or keyboard.