That's why it's so complicated, and has left and right parentheses commands. You start out with a clean concept and then sort of accrete guano. It lands on you and sticks and you can't do anything about it really.

But of course he was wrong about 1991-2026:

The days of non-raster stuff are numbered, though sheer momentum will carry it to the end of the decade.

And about AT&T as the same year (1984) they introduced BLIT terminal:

The fundamental tension in UNIX that I think AT&T doesn't understand is that everyone is going to have a bitmap.

https://youtu.be/Pr1XXvSaVUQ