Family resemblances

All four variants are Roman rites because they now include -- or, rather, ought to include -- the "pure Roman" elements -- i.e., the First Eucharistic prayer inter alia -- noted in the first post below.

Then, as Father duly notes, "an important way ahead in the direction of resacralising the Novus Ordo is through the sanctioning of alternatives derived from the Vetus Ordo. Happily, the Ordinariate Ordo Missae has led the way to a very significant and exemplary extent ... and [stands] as a major contribution, from our beloved Anglican Catholic tradition, to the whole Western Church."