Isn’t it also because going out nowadays is expensive as hell especially if you live in a big city. Young people working part time aren’t going to waste one month’s salary on one night out. And just hanging outside in public sharing a beer will make a nosy boomer call the cops on you for loitering. So the younger generations have learned how to have fun at home without booze.
I have a Nuki this one still works with a normal key, since you install it on top of your existing double cylinder (you should only install it on one that can have two keys inserted at the same time or with a turn knob on one side). The Nuki just turns the key or thumb turn of the cylinder. Also means you can’t see that a smart lock is installed from the outside. Battery is not a problem since they last for about 5 months. And you get a warning when it reaches 20%.