The person I replied to said, "that interface designers or even the average computer user understands more than in 1992 is highly implausible on its face"

Think of computer users at the ages of 10, 20, 30, 40, 50, 60, 70, and 80 in 1992. For each group, estimate their computer knowledge when they sat down at a computer in 1992.

Now do the same exercise for the year 2026.

How is it highly implausible on its face that the average computer user in 2026 understands less than the average computer user in 1992?