Waitaminute... what?
No one said having SoD in the game or out of the game magically bestows experience in using it to get the game experience you want...
A new DM is learning the game, he has to learn how to run the game he wants in the same way a player has to learn how best to play his particular character and that means that some things can only be learned in actual play. IMO, the experience of seeing SoD's actual effects in gameplay (as well as on ones players) is worth much more than you give it credit for.
Also, I'm a little confused as to what "how and if other systems handle" SoD's has to do with a DM shaping his D&D game to be enjoyable for him and his players... it's kind of irrelevant since you aren't playing those games...
Ok, I´ll try it again:
Back when I started with D&D, our game was ehavily influenced by the literature we´ve read and just a bit by tv, simply because comics, cinema and most tv was quite rare and our parents where against it anyways.
SoD fit quite well into the game we used to play then because it resonated well with our preconception on how fantasy should look like (aka Leiber, Howard, Smith).
Also, when you died, you were back in the game quite quick thanks to easy and simple character generation rules.
Looking at the last Editions (meaning 3E, PF and 4E), I don´t really see the old influences again except maybe as cameo appearances and with the added komplexity of the rules, character death and the chore of charaktercreation is akin to punishment.
Add to this that newer edition charakters are generelly tougher than ever before, SoD fails even more to portrait what it is intended to.
There is a disconnect going on what make SoD so terribly deadly and what SoD should be able to portrait.
When 25 tons of evil-tempered dragon repeatedly crushed you, you´ve survived said dragons breathweapon, had your lifeforce attacked by various spells, been dipped in hell for some rounds, all that in one days work, than a death attack DC represents danger? Being brain-slurped by a mindflayer is deadly? really?
So, no, I don´t think that 3E/PF/4E SoD or SSSoD portrait anything, they come along more arbitrary than anything.
Then again, look at older edition, when getting fireballed twice could be as lethal as doing a SoD save and so on.