Try running a business and you’ll see that checks are still pretty common.
I ran a retail business and took no checks. And I had no bounced checks.
Some people don’t want to join the 21st century. Doesn’t mean not being able to write a check is a bad thing. Time marches on, different skill sets are needed. Knowing how to setup an EFT on your bank’s website is a much more useful skill now than writing a check.