

I don’t think more difficult is correct, just different. Take cars as an example (because I don’t know anything about the engineering of large buildings): In the 1930’s and 40’s it would have been completely impossible to design and build a 2020’s car. But the cars that they did build then were not “more difficult” to design and build.
Engineers don’t work harder when they get new tools, they just make different things.
Dude is a pos, and old, but ageism like all bigotry is always wrong.