I edited a question today and used
<pre> instead of markdown for the post. This specific example what somewhat out of laziness with scrolling, but since HTML is accepted I didn't think it would matter to much.
I checked the latest edit and found the HTML had been replaced with markdown and commented "markdown is preferred to HTML". I gathered this was down to easier editing for users who don't know HTML, but I am curious to know if there is a specific [technical] reason for this preference?