See point 2 in my post immediately before yours. I believe that was the basic rationale for removing save-or-die effects.
Well if death isn't supposed to be a big deal, so what?
All death is instantaneous. Some instants just take longer to get to than others and are more melodramatic.
Either you are alive or dead. So it is always an instant change, and dice always affect that.
Save-or-die means little in the big picture. No different than that last hit Orcus that did it. Except you don't have a chance to save from a hit from Orcus. Attack rolls offer no chance to save at all.
I would rather take the chance of that 1 on a dice, than have no chance at all.