Paul VI's constitution created a new missal but it did NOT authorize, permit or command any priest to use it, and by extension, for anyone to attend it.  This is because to use this new missal is a violation of Quo Primum, which is still a valid law and which supersedes Paul VI's law.  Paul VI could have, in theory, changed or revoked Quo Primum but he did not.  So Quo Primum is still in effect and it allows any priest to say the tridentine rite, forever.  More importantly, it COMMANDS, under pain of sin, ALL priests and faithful to ONLY use the tridentine missal.  Many people forget that this law is both a permission and a COMMAND.

The point is, many people say that Quo Primum is infallible.  I'm not sure that is accurate, since it is a law and legal matters aren't usually infallible, because that has to do with doctrine.  But either way, Quo Primum is still a valid law and since it's permissions and penalties are still in force, then anyone who says or attends the novus ordo is commiting a grave sin of disobedience against the law of the Church.

Fake News fever in the Catholic world: No, Pope won't abolish Summorum

There seems to be a Fake News epidemic in traditional Catholic websites -- the latest of which are repeated reports of "rumors" (there are true and untrue rumors...) according to which Pope Francis wants to "abolish" the Motu Proprio Summorum Pontificuм.

The rumors recur periodically, with variations. Most often, it is said that Francis will do so as soon as there is a "deal" with the Society of Saint Pius X (FSSPX / SSPX) for the establishment of a worldwide Personal Prelature.

These rumors are not true.

Posted by New Catholic at 7/28/2017 11:20:00 AM
https://rorate-caeli.blogspot.com/2017/07/fake-news-fever-in-catholic-world-no.html

I hope he does. It might actually make the indult groups (FSSP, ICRSS, et al.) seriously consider sedevacantism or at least join the SSPX.

Interestingly, this is what they used to say about Bergoglio allowing adulterers to receive communion.

http://www.ncregister.com/blog/kschiffer/could-cardinal-sarah-bring-an-end-to-the-liturgy-wars

Cardinal Robert Sarah, prefect of the Vatican's Congregation for Divine Worship and the Discipline of the Sacraments, has offered a proposal which could unite the two camps of Catholic worshipers. According to The Tablet, Cardinal Sarah has set out steps for a “reconciliation” between the old and new forms of the Mass. Among the new ideas for achieving peace are:

• A new, shared calendar of feasts, ensuring that the Novus Ordo and the traditional Latin Mass use the same readings each day.
• An end to the phrase “reform of the reform.” That phrase, Cardinal Sarah points out, has become synonymous with dominance of one clan over another. “This expression may then become inappropriate,” he says, “so I prefer to speak of liturgical reconciliation. In the Church, the Christian has no opponent.” He suggests, instead, using the phrase “mutual enrichment of the rites.”
• Reception of Communion on the tongue while kneeling.
• The inclusion of “Prayers at the Foot of the Altar,” as was customary in the older form of liturgy.
• The priest, as was customary in the traditional liturgy, should keep his forefingers together after consecrating the host, thus demonstrating the utmost care, reverence and importance with which the priest regards the Body of Christ.

A new liturgy which incorporates elements of both the TLM and the Novus Ordo would incorporate periods of silence – not so that people in the pews can idly twiddle their thumbs, but rather, to encourage adoration and reflection on the mystery.
Pope Benedict XVI, in his Letter to the Bishops that accompanied the Moto Proprio Summorum Pontificuм, explained that he permitted the two missals to coexist not merely to satisfy the wishes of certain groups of the faithful, but also to allow for the mutual enrichment of the two forms of the Roman rite. “The two Forms of the usage of the Roman rite,” Pope Benedict wrote,
“...can be mutually enriching: new Saints and some of the new Prefaces can and should be inserted in the old Missal.... The celebration of the Mass according to the Missal of Paul VI will be able to demonstrate, more powerfully than has been the case hitherto, the sacrality which attracts many people to the former usage.” (Emphasis mine)