1974: ~14,000 banks
2008: ~7,000 banks
2023: ~4,000 banks
This has been a steady decline since 1974 (not 2008) in the US.
https://banks.data.fdic.gov/explore/historical?displayFields...
As a comparison, Canada only has 34 banks.
https://en.m.wikipedia.org/wiki/List_of_banks_and_credit_uni....
EDIT:
In case anyone is curious, these are the credit union numbers.
1981: ~7,000 credit unions
2010: ~7,000 credit unions
2023: ~5,000 credit unions