Before polls would not convert text to markdown or any of the other matrixdown features like !IMG.

Now you can use almost all of matrixdown. I say almost all because poll options get split by newline so if the feature uses multiple lines like code blocks, it's not going to work.

In theory embedding a poll inside a poll should work now. That's weird.

Here are some gifs in a poll congratulating myself.

Probably best to use small images in a poll unless you make them expandable. In that case you don't need anything fancy. Just list the urls.

In theory you'd pick images that are more coherent.