Both seemed to know rather a lot about a lot of things - rather too much to be honest to be just another individual with a technical/computing background.
I suspected they were industry insiders.
He he, I can understand why you'd think that.
If I had the time available that I used to have 25 years ago, I'd have been hacking away at those things too, and know a few guys that'd have been doing the same.
Any industry insideness would have been incidental. The incentive to play would have come from the same place that created Linux, and a desire for a better computing & networking environment. In fact, that is what we got up to in the nineties, but from a lower starting point!