Did you ever use an airport lounge? I didn’t even give them a second thought until I met my wife who has traveled all over the world and has racked up so many points that lounges were part of every trip she would take, and once we started traveling together she introduced me to lounges.
It’s a really nice place to rest on long layovers or if you get to the airport early for an international flight. They vary in quality but most have unlimited food and alcohol, some even have showers. They’re not busy, you can put your bags down without worrying about them, and go fill your plate or glass as much as you want to.
If you eat something in the terminal and lets face it who doesn’t, you’re going to spend at least 20-30 bucks, so at least take that off the price of your Premium membership upgrade and enjoy the experience of airport lounges which have a value of about $40 euros (you get 2). It takes some of the stress out of travel especially long international flights.