> I did have a vague idea that many still use cheques over there

Almost nobody uses checks anymore. I do, but I'm old and cranky. ;)

Actually, the only time I use a check is to pay rent because check or money order is the only way my landlord accepts payment. Apparently there is something called "e-checks" or something but writing out a check once a month isn't a pain point for me.

And it was required to write out a check (or money order) to get my US passport.