The last time I've used a check was close to thirty years ago. I assume ahartmetz's experience is similar.

Many countries have functioning giro systems. The U.S. is just an outlier.

I've never written a check, but I have had to deposit occasional checks. In the last 6 years the only checks I've received were first paychecks at a new job (before direct deposit was set up) and my covid stimulus checks.