I only run pet comfort mode when I need to. (It does, after all, use energy. And I prefer to conserve.
A slightly open, but locked hatch is not completely secure, but much more so than a completely open in. If it needs to be secure than I use pet comfort mode.
Does any have experience with a ventilation tailgate latch on an R1S? Do they work? Will the R1S lock with the hatch partially open?
(example: https://www.cleanrun.com/product/ventlock_car_tailgate_locks_and_cool_dog_tailgate_locks/index.cfm)