They are using the internet, but they're no longer internet citizens. They don't have any understanding of how it works (even on a basic level), and are being walled off into proprietary apps like cattle.
I would tend to agree with this. But we don't have to spend much time upbringing them to that level.
There are likely a few dynamics at play for this "eternal September": initial population size and increase rate, target population and its attrition rate, and transfer rate between the two. I'll see if I can run a few plots...