Man... one of the few really really good stories I read in Harry Potter fandom was a novel-length AU of the fifth book in which Cedric survived the end of Goblet of Fire, but got hit by a curse that basically gave him a degenerative muscle condition, so he's on crutches and will eventually be confined to a wheelchair. The girl (well, woman) who wrote that story is incredibly big on the research and realism and details, so after that, I just cannot take many wheelchair stories seriously.