Are you alluding to the Catholic deal on praying for the salvation of those who died without being saved? It sort of takes away the meme about self-will and having the opportunity to accept the incredible gift of Grace through Christ's sacrifice; and while it may be nice to think we can sway God's mind after the fact, I can't see where one would take comfort in it - even as a "backup" plan. The way I read it, we are given every opportunity to see to our eternal souls and if the New Covenant is accurate (I ascribe to the school that it is absolutely factual) then it is a fool's errand. It doesn't stop me from praying for them, but I have no confidence it is a prayer of any value - expect for the fact that the person(s) saying the prayer are connecting with God which benefits them because He is amassing our prayers at the foot of His throne.
Prayers for the dead are a waste of time and worse, we are told not to do it.
Pray for those that still breath and need to find Jesus.
Once a person passes, it’s too late.
With all respect, I try insofar as possible not to allude to anything if I can help it. I don't like to come ar somethiibg edge-wise, but to be frank and open. I wasn't thinking of anything lke "praying for the dead," for those whose outcome is already and finally settled.
What I meant was that while alive and sensible, one's own outcome can be changed by repenting from a life of trying to earn one's way to heaven, and instead by being born anew through total committed trust in Jesus alone to be saved from the wrath to come.
But also, one can improve his heavenly assignment as a steward of Jesus when He establishes His earthly Kingdom and uses saints to rule with Him, by putting His commands to work now. Those works will be recognized at the judgment seat of Christ, and be rewarded accordingly.
Of course, as you say, after one;s physical death there's not going to be any upgrading for those who ignored and rejected His Gospel.
If you read my Post #101 to answer Post #91, you will get an idea of my drift on this matter,