Sleipnir and Flying

[Jandor]

I purchase things that are useful and/or look cool. The reason that I purchased the $25.00 mount was because I was led to believe it would also fly in Stormblood.

If you wanted to buy a flying Sleipnir, you should have waited till a flying Sleipnir existed. You knew it wasn't yet what you wanted and bought it anyway. You're not even sure if it was actually said that it would fly, your first post is checking that that's actually the case.
I just don't understand the thought process here.