In my collection of English Mass settings, 1965 and beyond, (mostly published by McLaughlin & Reilly and J. Fischer Bros.) I noticed that in the time period up until 1970 there was always a sung Credo. After the changes in the Mass were promulgated in 1970, though, the Mass settings did not include the Credo.

In Canada, nearly** no one recites the Nicene creed any more: it also makes the Mass longer, so I’ve been told. (I've also been told the Nicene is “divisive”, but that can't really be true, can it?)

In a way being divisive is the entire point of the Creed. It cannot be said by a gnostic or an Arian. But is should not be divisive for otherwise orthodox Christians.

Fascinating about the Creed. I'm in Spain at the moment, and the EF chapel i'm attending sings credo III every Sunday or recites it in latin if the cantor is absent. In Brazil my experience is it has never been sung, only recited, in the NO. In the EF in rural traditionalist parishes the people sometimes sing a vernacular version with an easy if cheesy sing-song melody; at cathedrals or larger parishes it's sung in Latin, Credo III usually. I've never heard it only recited in the EF context. Fancy parishes with good scholas may use other Credos as relevant. But often the priest doen't know the other ones well, so as with the gloria he sings a common start, and the schola diverges to the version they want after.

Some traditions are bad. The Tradition of the celebrant not engaging at all with the congregation was bad, as the Council of Trent taught. And even if you quote me reams of instructions from SCR, I point to Trent Session XXII ch. VIII, as I have done before. A homily on some text of the Mass should be a standard requirement, but was not.

If you really want divisive, use the Athanasian Creed.