Is the advice from The Richest Man in Babylon, published in 1926, out of date?

* https://en.wikipedia.org/wiki/The_Richest_Man_in_Babylon

Avoiding greed, envy, the hedonic treadmill, etc, will never not be good advice.

Because people now are so wildly different from people 150 years ago? We are exactly the same, with slightly shinier toys.