Let me ask you one thing, DR: if even a 62 year vacancy is possible, is there any limit at all to the length of a vacancy? Is a 100 year vacancy possible? a 620 year one. A 1000 year one? Can the See have been vacant from 1100 or 1200 as Ibranyi claims? Clearly, that is wrong, and there is a limit. I submit that that limit is the time it takes for all Papally Appointed Bishops to die or resign.
The solitary evasion is very frigid. It should be noted early sedevacantists did not claim this but openly acknowledged themselves that their theory required that the Cardinals and Bishops appointed by the "AntiPopes" were not even Cardinals at all, nor had authority. This latter day evasion is just one, last, desperate attempt to save sedevacantism from reducing into open heresy in my opinion.
As for the claims of supplied jurisdiction, jurisdiction is not supplied to heretics. Are the appointments of the Patriarch of Constantinople or of Moscow authority-conferring because of supplied jurisdiction. If they are not, then neither are those of alleged heretic non-popes.