I think so.
> 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"
Yes, I agree with this person.
>How is it highly implausible on its face that the average computer user in 2026 understands less than the average computer user in 1992?
I don't think it is. Particularly with the average user, the bar of understanding is lower now.