I stand corrected. I was under the impression that some stations (14th Street on the East Side?) were lengthened into curves and thus needed the extenders. That's the back story for my layout. 😁
I also understood that some curved stations (City Hall, South Ferry) originally didn't need extenders because the first subway cars only had end doors which were close to the platforms, but that extenders were needed when they started using cars with center doors (not at City Hall, which closed early). In any case, extenders are cool! 😃
