The best part about choosing a simple WM is you never have to think about it again. I installed and configured DWM many years ago and it just works. Never had a single issue after the first week.
It is like when you buy an appliance and it just fades into the background and then, one day, you realize you've had it for 10 years without any problems and you feel a tinge of gratitude before moving on with your day.
Same story here. After installing dwm years ago, I've more or less stopped thinking about window managers as an open problem to be solved. I suppose one could run into trouble if they started patching it a lot, but in my experience you don't need to do that.
It is like when you buy an appliance and it just fades into the background and then, one day, you realize you've had it for 10 years without any problems and you feel a tinge of gratitude before moving on with your day.