U.S. companies derive significantly more earnings from operations outside the U.S. than they did in 1976 (in proportional terms, as well as of course absolute inflation-adjusted terms).
In the current environment, however, Apple is showing few signs of slowing down and could very easily make a run at becoming the most valuable company in history in both absolute and inflation-adjusted terms.
The process of paring down my spending to the absolute essentials, and realizing how much I spend on nonessentials, really helps me curb lifestyle inflation.