Could you respond to MM's question? If both orders and jurisdiction is required for Apostolic Succession for sede bishops, doesn't it also apply to the SSPX bishops? Do your SSPX bishops have apostolic succession? And if they do, why is that different than those sede bishops that trace their lineage from ABL and Thuc?
2Vermont and Misereremei, the argument hasn't been: "the sede bishops don't have Apostolic succession. the SSPX bishops do. Therefore, whatever ...". No.
Rather, it has been: "In a 62 year vacancy, the entire Church will lose Apostolic Succession. This will come about when all Bishops appointed to office by the last Pope die. Therefore, a 62 year vacancy is impossible."
So, yes, I agree Orders and Jurisdiction are necessary for Apostolic Succession for BOTH Sede and SSPX Bishops. But what cannot come to pass is that the ENTIRE CHURCH (i.e. all Bishops) loses the power of jurisdiction.
As Yeti has kindly docuмented for us, the last Pius XII-appointee has died. As for my proof that Ordinary Jurisdiction is required for Apostolic Succession, I've cited many in the past; I'll just cite Msgr. Van Noort now.
"Obviously a man does not become a genuine successor to the apostles merely by arrogating to himself the title of “bishop,” or by carrying on in some fashion a function once performed by the apostles. Neither is it enough for a man merely to possess some one, individual power, say for example, the power of orders. - The power of orders can be acquired even illicitly, and once acquired can never be lost. - What is required for genuine apostolic succession is that a man enjoy the complete powers (i.e., ordinary powers, not extraordinary) of an apostle. He must, then, in addition to the power of orders, possess also the power of jurisdiction. Jurisdiction means the power to teach and govern. - This power is conferred only by a legitimate authorization and, even though once received, can be lost again by being revoked." [Christ's Church, Monsignor G Van Noort]So does that answer the question?There is another issue unique to SVism - the Church Theologians say that, in the case of an alleged Pope-Heretic, the Ordinaries must be gathered in Council in order to make a declaration before a new Pope is elected. So if SVism is true, how can that now be done? Now, if SVism is not true, then this wouldn't need to be done. The SSPX Bishops certainly weren't already Successors in 1988. Bishop Fellay has argued the Three Bishops received Ordinary Jurisdiction after the Holy Year of Mercy, from Pope Francis: https://damselofthefaith.wordpress.com/2015/12/01/ordinary-jurisdiction-for-the-year-of-mercy-bishop-fellay-says/ But whether they have or if someone believes they have not, that is tangential to the question of whether a 62 year Papal Vacancy is possible or not.