Modern boxing trainers or fighters commenting on early fighters' technique?

We get into so many old vs modern arguments about technique, but I rarely see anybody posting sustained analysis from modern professional fighters and trainers about older fighters' chances against today's guys.

I remember watching Ali disparaging the Dempsey/Willard fight as he watched it, and Tyson commented about how Johnson's style was limited by modern standards.

Other than that, most of what I've seen is just a trainer saying that so-and-so was a great fighter, and maybe listing what he was known for. Rarely have I seen any clips or analysis from boxing professionals about how older fighters would perform today against modern guys.

Any examples you can post or name?