This image appeared recently in the WSJ.

What do you think about this? Does it show that US borrowers have all been getting a lot better during the last 8 years? Or does it show that FICO scores have been inflating for the last 8 years?
I believe it is some of each. The chart starts at the time of the financial crisis, when lots of people were having some trouble, and just about everything has gotten better since then. However, we know that there was some difficulty in borrower-land in 2015/6 because we saw huge dips in performance of LC and Prosper loans, and also dips in performance of subprime auto loans. That certainly is not indicated here.