I mean, if saying what I've been saying since my first few posts in this thread is moving the goalposts, perhaps moving the goalposts doesn't actually involve any movement.
And of course we all know that technically is the best kind of correct!!! Me, I prefer actuality, and in actuality the gate towns are and always have been more the border plane than the Outlands. That's why the continually fall into the neighboring plane and a new town has to appear.
The only sophistry here is yours in ignoring the history your saying flies in the fast of the history. This is from the 2e set.
"Automata: Character.
As a tiny reflection of nearby Mechanus, there's a rule for everything here, and gods help the berk who ain't learned
them all!"
"Bedlam: Character. Not really a town, but an asylum let loose - that's what this place is. The chant is the town's mad, that the barmies have seized the keys,
but what's a soul to expect from a place that's hard on the gates of Pandemonium?"
The rest are similar. You are the only one ignoring history here and trying to say the towns were other than mostly a reflection of a plane other than the outlands.