All other social media is completely captured by full-width images. Scrolling a feed of images is psychic assault. With words, you're growing your mind. With images, you’re enslaving your mind.
On WeWrite, if we do end up adding image functionality, they will be small inline thumbnails, which can be expanded into a lightbox.
With this approach, the natural reading movement of one-line-at-a-time and left-to-right (or right-to-left, in Arabic) is preserved, and your mind isn't hacked by the image.