Quote Originally Posted by Brookshw View Post
It's not relevant, petitioners memories are stripped while the soul travels through the Astral on the way to Baator (or wherever), coming out of the river has no bearing.
Leaving behind an astral memory core, yes, but I have seen no mention of that in 5e.

What we do have now is the Raven Queen and her shadar-kai coveting the sedimented memories of the River Styx.