"Cremation" entry in Catholic Encyclopedia: https://www.newadvent.org/cathen/04481c.htm
> By the fifth century of the Christian Era, owing in great part to the rapid progress of Christianity, the practice of cremation had entirely ceased.
> The Christians never burned their dead, but followed from earliest days the practice of the Semitic race and the personal example of their Divine Founder. It is recorded that in times of persecution many risked their lives to recover the bodies of martyrs for the holy rites of Christian burial. The pagans, to destroy faith in the resurrection of the body, often cast the corpses of martyred Christians into the flames, fondly believing thus to render impossible the resurrection of the body. What Christian faith has ever held in this regard is clearly put by the third-century writer Minucius Felix, in his dialogue "Octavius", refuting the assertion that cremation made this resurrection an impossibility: "Nor do we fear, as you suppose, any harm from the [mode of] sepulture, but we adhere to the old, and better, custom" ("Nec, ut creditis, ullum damnum sepulturae timemus sed veterem et meliorem consuetudinem humandi frequentamus" — P.L., III, 362).
Yes and no.
I entertain theories about Heaven occasionally while also recognizing it's unknowable.
We don't know if Heaven will eventually get boring or if our favorite saucepan will be waiting for us at the Pearly Gates.
We inevitably arrive at the conclusion that these questions are unknowable without proof, at which point we are no longer debating theology.
This is why I also don't twist myself in knots over End of Days signs like other Christians do: it's interesting but if you have faith then you trust in God to take care of such things.
And in that case there would be no relevancy if a corpse is buried (and long rotten down to a skeleton) or burned. My mother said she wants to be burned to ash when she dies and poured into the wind on a mountaintop. For me it's irrelevant, whatever is best for my family - but I'd be fine with the idea of becoming fertilizer for plants that grow over my corpse.
Just to note, fourleaved believes that everybody is literally resurrected into their prime form. That's simply not plausible.
What seems like an imperfect world and unfair events and illness is really a perfectly designed environment for it's purpose.
As for Heaven, perhaps a lot of our questions become irrelevant if we no longer experience linear time there?
This is off topic, but one thought that always puts a smile on my face is the possibility that God is all knowing and timeless, meaning none of our personal experiences are ever lost, instead recorded forever in God's memory.
If so, it means we have the power to choose to weave events and memories forever into the fabric of reality. To contribute moments of love and joy between our family and between ourselves and God that become part of an eternal tapestry.
Personally the only thing that I consider to be an L as far as heaven goes is the very likely lack of all sex with your spouse for all eternity - even though I know that it is a drop in a bucket compared to what, if anything, will replace it.
It seems that free exists and negative emotions exist in Heaven, at least for the angels.