So, my wife is Portuguese and we’re moving there in a few months. I think the last thing you said explains this map - it’s far more likely to me that a bunch of old Portuguese people don’t consider their phones to be “the internet” because I’ve literally never met someone I. Portugal who hasn’t been online.

Also considering how some of the older folks view paying taxes I wouldn’t think paying taxes online guarantees that they use the internet. Quite the opposite :D