If he’s got a machine that suits his needs then why on Earth not? Apple changed direction on making iPhones thinner to accommodate more of what they wanted to include, the 7 was thicker than the 6, the 8 thicker than the 7 and the X thinner still. All is not set in stone here...
We are not even talking half a millimetre of difference in thickness between the iPhones, hardly can be described as “changed direction”. Forced to do so as well probably (bendgate, having to go water resistant to keep up with competition, battery complaints etc).
Now if they had re-added the headphone jack, you’d have a point. That would be a real change of direction.