Since then, I have got my copy of Bugnini, and here is what he has to say:
The Septuagesima season is suppressed, and the three Sundays making it up become Sundays of Ordinary Time.So it seems I was right, and that is why in my new Missal today is simply listed as the Fifth Sunday in Lent. Moreover, the veiling of statues and crucifixes is merely a pious tradition and should not be done (if that is what 'even externally' means, which I think it must).
Also suppressed, as a title, is "Passiontide." The whole of it now becomes, even externally, part of Lent.
This seems to my to typify much of the impoverishment of Bugnini's changes. Instead of the emotional crescendo of Septuagesima - Lent - Passiontide - the Triduum, we know have a binary system: Ordinary time to Lent. Likewise with the suppression of the Octave of Pentecost, we have Pentecost, then Ordinary time.
It is all very logical and all very much poorer.
I am pleased that I managed to get to an Extraordinary Form Mass, where we celebrated Passion Sunday with dignity and solemnity.
For Passiontide, then, here is a recording of the four different settings of the Passion Chorale in Bach's St Matthew Passion. The harmonies get richer and more plangent each time. Magnificent stuff!
(Though I cannot resist quoting Beecham on Bach: Too much counterpoint - and what's worse, Protestant counterpoint! But that does not apply here.)