Why switch to a traditional alarm clock?

I use oldskool alarm clocks. I have a rule: no smartphones present in the room whilst I'm sleeping. There is the added benefit of saving some power too, as the oldskool alarm clock's power has been going strong for 10 years now (running on 3 AAA batteries). If you add up all the times a smartphone has to turn on temporarily, and do the math: it's a battery drainer.