I think you did not read it closely enough. The article says right at the top that it is part 2 in a series, and that part 1 was 1974, with a link. That Part 1

I think you did not read it closely enough. The article says right at the top that it is part 2 in a series, and that part 1 was 1974, with a link. That Part 1 discussed UFS in depth. The point being that (1) by 1984 UFS was far from state of the art and (2) you need to understand the 50 year old SOTA to understand what was different in the 40YO SOTA.