I met and worked with alot of the early internet pioneers and they were some of the most clever and insightful people that I've ever met. I assure you that barring a serious medical condition they all maintain at least a basic awareness about the state of computing.

1. What makes you think any of the Internet pioneers are not "with it" as you put it?

2. What makes you think you know how you'll feel in 50 years? You cannot possibly predict that.

LLMs are a frequent topic of conversation on at least one ex-employees-of-an-internet-pioneer mailing list, yes.

What is the mailing list?

If you worked for Bolt, Beranek and Newman, you're eligible.

To make a blanket anecdotal statement, personally they seem to be fairly with it on new technologies. Not the most in depth understanding but definitely above the average person.