I suspect it's the other way around, or a cyclical effect. Plenty of people simply do not allow themselves a full night of sleep, or feel that they cannot afford a full night of sleep (e.g. working 2 jobs & raising kids), leading to dependence on caffeine for functioning.
Yeah it’s probably some kind of feedback loop. Over time the loop leads to more and more caffeine consumption and worse and worse sleep.
I can tell you from personal experience it’s not a good thing to have happen to you. Once I reduced my coffee intake to 0 cups a day my sleep became so happy and blissful.
Alas I’m back to drinking 1-2 cups a day. I hope I never go back to that feedback loop so I make sure to only drink coffee in the morning or early afternoon. Never later on in the day.
