I'm in Canada, originally from Europe; and to simplify, I never really "understood" regional banks. I was an exchange student in Minnesota and banked with... "Bank of Fairmont". Tiny city of 11k people, and it had its own bank. Seemed horribly inefficient and weird; and then when you left your home town you were in a load of headache. Of course that was 25 years ago, but still, when I hear there are 4,000 banks in USA (not branches; separate independent banks), I cannot help but ask... why?? Until recently, USA seemed way way
way behind on convenience and efficiency; and the "fintech innovations" that are happening now seem built on ridiculously sketchy framework.
Understood that small regional banks exist and it'd be senseless and disruptive to kill them off now, but if we take them as a historical artifact that we must live with, what actual advantages, in clean-sheet model, do they have, that would counter-act the poster's main point?