Great news for those of us who can’t express ourselves without extensive parenthetic remarks - in the last forum upgrade we included a plugin that allows you to include footnotes on your Community posts.
The syntax is
for the footnote[^1] anchor and [^1]: for the target (don't forget the colon)
The default behaviour is to render the footnote target inline in a popup  - click on those three dots - but let us know if you want to make a case for or against the traditional behaviour of rendering at the bottom of the post. (Personally I like the old-skool option but I will admit the default behaviour results in a cleaner less intimidating presentation).