As for mount ill just put this here, as jabberie said it was somthing i added in legion jamba was bron in wotlk, would not call that somthing thats been part of yhe core for "ages", if we was talking about taxi then i understand a bit more!

The mount infact came from somthing hydra had. (That project is now dead and would think mount would not work)

As why it was removed it uses arua and spell names both of witch blizzard as made big changes on. Tons off addons are broken from having problem i spend 3 10 hour long days getting ot to work for ema as ema and jamba dont use the same libs/backend systemd its not a fast job just to fix it. So no i did not remove it because am having a mardy. As well one more even ema mount is funny becouse its so hard in blizzards api to till if you mounted or not they just dont give us the tools we need!