We think we have it bad? According to the PBS-USA site, only seven parishes in ECUSA use the 1928 American Book of Common Prayer at their principal services. (However, their listing would appear to be incomplete).
*St John's Chapel, Monterey CA
*Guardian Angels, Lantana FL (Missal interpolations)
*St John's, Savannah GA
*All Saints, Thomasville GA
*St John's, Detroit MI
*All Saints, Wynnewood PA
*The Zabriskie Memorial Church of S. John the Evangelist, Newport RI (with Missal interpolations)
*St Andrew, Fort Worth TX
*St Thomas, Houston TX
Why the popularity of St John and All Saints?
All Saints, Thomasville, uses the 1979 kalendar and lectionary.
One wonders if the folks in Wynnewood lose any of their potential customers to S. Clem's.