Both ASCIIdoc and reStructured text are older and better (subjective, of course), yet Markdown still won. Happens sometimes, nothing to see, I've moved on (with just a little grumbling). Now I often can't remember their syntaxes anymore, Markdown is everywhere.
rST is certainly more powerful, but I always found it harder to get into the flow of writing it.
I've posted my feature matrix elsewhere in this thread:
https://keenwrite.com/blog/2025/09/08/feature-matrix/
The matrix, which you can download, aims to provide an objective comparison. Any idea what features are missing, or can you qualify what makes the other text formats "better"? From my perspective, they are largely equivalent.