Exxon is a cute example though. At one point, they owned Zilog.
* Exxon: Massive amounts of technology have been ingested by the oil majors in the last 50 years. It is basically a high tech business at this point. Also, if we only focus on the physical work, fracking didn't exist 50 years ago, and now it is a major part of the industry. Again: Huge changes.
* Coke/Hershey: Think about how much automation exists in their manuf. Do any humans touch a "bottle" of Coca Cola before it is packaged? I doubt it in highly developed countries.
* Wells Fargo: the same as Exxon. Commercial banking has a fraction the number of employees _in proportion to their assets under management (AUM)_ compared to 50 years ago. How/Why? Automation / computers!IBM absolutely was in the punch card machine making business in that they were absolutely selling punch card machines and not data processing consulting. And no, they are not in the data processing business today. They are clearly a consulting company first with some software development bolted.
They actually pivoted twice from a mostly hardware company to a mostly software one and once again to a mostly service based one.
So sure those brands are 100 years old, but the underlying companies have been restructured several times with major mergers and spin-offs etc. ExxonMobil even did the baby bell thing of splitting off from a single entity only to merge again and again in the coming decades.