As someone who isn't visually impaired I have little to go by or background to judge, but HN strikes me as not being particularly inaccessible, given its minima

As someone who isn't visually impaired I have little to go by or background to judge, but HN strikes me as not being particularly inaccessible, given its minimal UI and very little reliance on non-textual elements, in particular compared to most social media sites. What in particular would you wish to have improved?