One reason I started this forum and chose the software we have here is that I wanted it to be easy to post photos and videos in the posts and also in the comments. I like the possibility of markup too, although it’s perhaps relatively rarely used here. Quoted text and verbatim text are used quite often, I suppose. Rarely a numbered list!
Maybe not everyone realises this, but it’s possible to copy and paste an image into the compose box here. Maybe even possible to drag and drop.
And a link on a line of its own will often put in a one-box with picture, title and snippet.
(All that said I do like the text-only aesthetic of HN.)
Edit: while I’m making meta-comments on presentation, hopefully everyone knows that this forum has both a plain theme and a fancy theme - check your preferences. The fancy one looks like this - it has snippets and often an image:
BTW, I found out why I am seeing broken image icons for a few images: These are directly linked images (as opposed to uploaded ones), which originate at plain http sites – while I am using Firefox in https-only mode. (If anyone should experience this, as well: a click on such an image brings up the familiar non-https warning dialog in a new tab, which in consequence reveals the image.)