I saw your username first.
Then I misread the rest as a Mallard Reaction.
I'm living in a 15 floor apartment building with a single stairwell. (Germany, the building is from 2015)
There's two elevators, one of them is equipped for firefighters (manual control possible after inserting the firefighters' key, windows)
The single escape stairwell is isolated from the rest of the house by double doors (kind of an airlock against smoke). The escape stairwell is isolated against smoke and fire.
Also on every floor there's a kind of glass cage in front of the elevators with a normally open door, in case of fire this will isolate the elevators against smoke.
In case of a fire alarm all the doors will automatically close (you can still open them. manually), additionally huge fans will be pulling clean air through the stairwell and the elevators.
We have individual fire alarms in every room - and a common system, connected to the fire department, in the shared areas.
So it's a "put all of your eggs into one basket, but have a damn good basket" concept.
Btw, I'm on 8th floor, so too high to jump and probably already out of reach of the FD's "extensible ladder" car.
In elementary school my son would not memorize addition and multiplication and just use strategies like this.
That became a problem later on as we just can handle a finite number of intermediary results in our brain, so just memorizing the tables reduces a lot of mental load for calculation in your brain.
Another thing that helped him a lot was just writing down intermediaries on a piece of paper.
Btw it was a bit similar for me, I just got the table memorized perfectly and got faster doing simple calculations in my mind than using a calculator when I was training the multiplication and addition tables with my son.
I recently visited a friend and noticed her laptop was turning into a spicy pillow. I opened it up, showed her which replacement battery to order and call me when it's here to install it.
Next week she called me, she had successfully installed the replacement battery herself. "Ah I saw where it went, I just tried"
Typically it's not hard, you just need to know where to look and not be afraid "ooh it's tech".
It works by applied statistics.
When you littered before - with the old cap - you'd have two pieces of plastic, now they are connected and it's only one piece.
I'm only mildy annoyed by the new lids and got used to them, but it's the bottle cap regulation is one of those that's purely better for statistics.
It reduces littering by bottles to around half, just because we count the pieces differently now.
Maybe we should better just start taxing by the amount of plastic used in food packaging, as a lot of the packages get bigger and bigger just to display the contents more visibility.