It’s good to assume that it heavily depends on airport, and time. I’ve been many times in the past years when just security took me more than 30 minutes. There are airports where it’s always less than 10 minutes (especially if you know some tricks), and there are airports where it depends on time. One hour is a good rule of thumb in Europe nowadays if you don’t have checked baggage. It would have been a stretch a few times, but I would have never missed a flight if I had been there only 1 hour before departure.