Slack's "markdown" is horrifically broken and one of the worst markdown experiences in existence. I believe they no longer even refer to it as markdown since they have strayed so far from the spec.
Bold, italics, links, etc. -- sure, false positives there are rare enough and the means of correcting mishaps are intuitive enough. The OL issue though... so many go uncorrected.
This title belongs to ClickUp.
FWIW, WordPerfect's "reveal codes" feature remains my ideal solution.
Long before the advent of desktop publishing and GUIs and markup languages. Split screen horizontally, vs vertically side-by-side, with WordPerfect's own nomenclature for formatting attributes. Edit in either screen. Live cursor shown in both screens. Live updates back and forth.
Heaven.
I haven't used WordPerfect for decades, so my bias might just be nostalgia.