This was a slightly underhand remark, as it clearly wasn’t “merely” an escalator.
Indeed, I’d come to the station precisely because it wasn’t “merely” an escalator, and was instead the only one of its kind still in service on the entire network.
It’s around 100 years old and is certainly a charming oddity. All of its cousins across the network were scrapped in the wake of the King’s Cross fire in 1987.
By all means take the effort to visit Greenford and experience this unique chunk of motorised history. Just remember to secrete your camera in a specially-designed satchel, or within a ring like the one Roger Moore had in A View to a Kill.
Oh, and don’t, whatever you do, behave as if you’re there to admire something.
(A different Ian has a different, and better, set of photos.)