I've only lived in the US for 3 1/2 years so have travelled in Europe.
I just wish the airlines would be clear and actually measure cabin baggage.
A standard would be good and the better your cabin the more you should be allowed.
Mrs J used to commute to Germany weekly for over a year and her luggage was delayed once, not a bad record.She was given an over night kit and her bag arrived early the next morning by courier.
I pay $25 to check my case but I know that when I book a cheap ticket, thats why its cheap.