The best Counterpoint is that the average time of a company being part of the Fortune 500 is declining over time. This means that there's greater turnover and disruption. a Fortune 500 company today is less likely to still be a Fortune 500 company tomorrow then most of the history of the Fortune 500.

This tells a different story than the article which focuses on the average age of companies including time not part of the Fortune 500.

It would be interesting to run the same analysis for the Fortune 100 and the fortune 500 to 400 companies

https://www.aei.org/carpe-diem/only-52-us-companies-have-bee...

Also, not sure Twitter's price is a great example of a reliable value.