We are 100% with a local credit union.
When I was a baby, I got my first CU account. A few years ago, I called them about a car loan. When they asked for my number, I read it to them.
Her reply: “Whoa”
I forgot that my grandfather was one of the founders of the CU and I had a double digit account number. Needless to say, I got the loan with no further questions
Love it. I still have my triple digit account number, with my hometown CU.