Miserable stuff. Ordinary Americans in 2016 might have creature comforts that weren't available to John D. Rockefeller, but this does not somehow translate to being "richer than" Rockefeller.
Rockefeller's wealth can be seen 100 years later, in forms that no creature comfort can surpass: media and political power, generations of rich and powerful children, and countless buildings and institutions named after his family. None of that is meaningfully offset by the fact that it's easier for me to keep ice cream cold, that I can travel to France a little bit faster (but a whole lot less comfortably), or that I can watch content produced by his progeny online whenever I please.
Rockefeller's wealth can be seen 100 years later, in forms that no creature comfort can surpass: media and political power, generations of rich and powerful children, and countless buildings and institutions named after his family. None of that is meaningfully offset by the fact that it's easier for me to keep ice cream cold, that I can travel to France a little bit faster (but a whole lot less comfortably), or that I can watch content produced by his progeny online whenever I please.