Out of 100~ shirts I have maybe 6 that are barrel cuffs. In the UK French cuffs are meaningless, no one even notices them, but in the US I get the impression that you'd be arrested for wearing them unless you have several private jets and a yacht.
Americans use them a class divider whereas the rest of the world uses them to keep the ends of their sleeves shut. I can't speak for Finland but in the UK it is more than acceptable to wear FC shirts without a tie.
Agree with all of this, except does anyone in the UK actually call them "French cuffs" (vs. "double cuffs")?