Also, I am 36, and I live in a country (Denmark) that has entirely abandoned cheques, but I am still familiar with Danish cheques (even if I never managed one myself). Additionally, I still see them frequently when I am in France. (Though these days, the vast majority of cheques I see are US cheques, since my wife is American.)
Checks to pay for a kid's school trip, or a soccer club membership, etc are very much a thing in many of the EU countries with 50+ million inhabitants.
[0] https://www.statista.com/statistics/443677/cashless-payment-...
Bedsides being wrong, as another comment points out, you’re describing the EU’s largest economies.
[1] https://www.statista.com/statistics/443371/check-payment-in-...
[2] https://www.statista.com/statistics/1110744/share-total-eu-c...