When Marcel went to his eternal "reward," he was beyond any earthly authority to lift his quite justified excommunication and Benedict XVI (who signed off on the original SSPX excommunications as Prefect of the Congregation for the Doctrine of the Faith as did Bernardin Cardinal Gantin of the Congregation for Bishops) did not purport to lift Marcel's excommunication since he could not. Were Pope Saint John Paul II and Joseph Cardinal Ratzinger right or was Benedict XVI right or was there some intervening reconciliation of the living SSPX schismatics with the Church and papal authority? Not according to SSPX publications which continue to posture as though Fellay and his co-conspirators have the standing to "demand" that Pope Saint John Paul II, Benedict XVI and this new and hopefully temporary guy and presumably any future popes that they adhere to the fantasies of the schizzies as a "condition" of the schizzies RETURN to the RCC.
Got along without them before we met them. Gonna get along without them now so long as Frankie does not further confuse the reality with another "Who am I to judge?"
That question never occurred to Pope Saint John Paul II because he knew exactly who he was to judge and he did as holder of the keys of Peter.
Benedict XVI who had, in his days at the Holy Office acquired the nickname "The Rottweiler," by the time he became pope had become a nice old man "a puppy dog" with intellectual credentials who just wanted everyone to get along. He lifted the excommunications as an act of mercy and the schizzies proceeded to piss all over him and his generous efforts to reconcile them because he would not submit on bended knee to their non-existent "authority."