TL;DR: Anthropomorphic planes aren't humanoid (due to their non-human faces) but aren't allowed under anthro either (because they aren't animals). That's a problem (to my pragmatism).
With the summary out of the way, should we make a new tag for things that are clearly based on something non-human and have then been given human features? Or would it be better to slightly redefine anthro to mean anything that has been given human features?
I don't think changing humanoid is a good idea, as that fits pretty much perfectly a niche of human that has been slightly altered, so that should stay as is.
Updated by Genjar