The original standard didn't have DIV or TABLE
wanted to stick to the earliest revision of the HTML standard as possible
The "thread list" uses a table element, as does the SchemeBBS main page. Additionally, I find your statement quite puzzling for the following reason. The DOCTYPE on this page contains "ISO/IEC 15445:2000//DTD HyperText Markup Language//EN". The first edition of 15445:2000 from 2000-05-15 can be found at
https://www.scss.tcd.ie/misc/15445/15445.html
In "Annex B Entities, element types and attributes" the block elements are listed as
<!ENTITY % block "BLOCKQUOTE | DIV | DL | FIELDSET | FORM | HR | OL | P | PRE | TABLE | UL" >
Would you happen to be the lain that frequently posts this type of thing such as in the challenge thread?
The "frequently" bit makes me unsure about what you're asking but I did post the trig and zigzag fizzbuzzes there. Maybe the spiral should be a fizzbuzz as well.