I'm a dwarf with disability in limbs, my biggest concern has been navigation in smartphones/apps; especially since they are growing in size. Fortunately I have good engineering experience and was able to customise my devices (android: pie controls) according to my needs. I wonder whether the reason we didn't see much tweets in the post for people with limb disabilities are because they weren't able to access twitter in the first place.

I must credit smart watches (Android wear/ Apple Watch) here, I'm sure it helps a great deal for people with disabilities. Accessibility is one good reason for not to let smart watches die. I'm planning to write a blog post on this context soon.