Reflow is difficult for WCAG because it doesn't fit into POUR

If you think about enlargement with reflow, it is both perception and
understanding. It is not in one or the other.

Enlargement is necessary for perception of strings of letters, but to
reading you must group letters into sentences and paragraphs. Horizontal
scrolling makes that too difficult. The role of reflow is understanding.
Reflow enables the understanding needed to read.

I guess that is a silver thought.

Wayne