I think Ronny is right, personal choice is the main reason people seem to prefer an app.
I think Maya has more penetration in the film industry and Max in the games industry, although thats not to say that there is a massive differance between the two in each industry.
I’ll do a rotation when I have it all textured, posed and with the witch king on its back, I’m currently thinking of having it about to land on a ruined building. You know kind of rearing up, with its wings out and the Witch King on its back looking off to one side to the distance…….I’ll try and superimpose it onto a shot from the film which has a nice view of the mountains and Mordor.