Sometimes One Has to Stop and Remember How Much Things Have Changed

When PTC was founded in 1979, there was no internet. The Apple II had barely been commercialized. The IBM PC did not exist. Globally, about 4/100 of one percent of humans used a cell phone. We did not text, we called--from a phone connected to the wall. 

There was no World Wide Web, home broadband or consumer GPS. There was no social media, no video or audio streaming. We did not use email. 

Ethernet was not yet commercialized. It did not become a standard until four years later. 

In the U.S. market, consumers could not legally attach their own phone or modem to the network: it was illegal. Phone service was a monopoly. Only one firm could be in that business. 

The amount of bandwidth linking North America and Europe could be measured in T1 circuits. 

So yes, much has changed.