That would be a thing if there was a reason to fly in WoD. There just isn't, there's barely cause to even use a ground mount once you've actually level capped. I guess that ties in to the lack of things to do, even the world content Apexis dailies actually feel like instanced content.
It is kinda strange, I have a ton of alts which is fine; I have plenty to do because of that, but that's traditionally been an end tier thing rather than a fresh expansion thing for me.