Battle of the Transmissions: M/T vs. A/T

[Woof]

For AT, when stopping for long periods of time, do you:

1 set to neutral and handbrake
2 or leave it at D and handbrake

Common answer from other folks is (1) but there's a youtube video from Engineering Explained saying that the shifting action from D-N causes wear on a more expensive part to fix than the wear when leaving it at D. (Well this is my understanding from the vid)

I guess we should also be specific with respect to the type of AT: conventional (planetary-gear) or CVT (belt-driven). For me:

Conventional AT - #1
CVT - #2 (leave at D and brake hold)