Christianity has an ancient tradition of relics in which even in the absence of an actual corpse people will just pick up some random bone and be like "this was some old ladies actual hand, it has magic powers now" and then parade it around the city every year.

I just got back from a triple to Naples where there's a church that had a secret skull collecting cult under it for decades, it's a tourist attraction now. Yes it is still full of peoples skulls.

So yes, it seems like there is a statute of limitations on our obedience to the dead.