There is no more or less "realism" in any edition if you sit down and honestly look at it. Our imaginations contour to the game rules we learned to play with, not the other way around.
The whole "verisimilitude" argument is a crock. We play a game with flying dragons and powerful wizards where players can magically and instantaneously "heal" from life-threatening injuries, crushed psyches, exhaustion even dehydration or disease.
Any loss of "immersion" due ANY rules set we use is a product of our own bias and imagination shortcomings, not the rules themselves.
I really hate the idea that if you allow some concessions to verisimilitude for a fantasy genre you have to concede to any and every other verisimilitude breaking thing that comes along.
It's about equivalent to saying you can't be dissatisfied that someone at your table is trying to play a scifi character (say, using d20 future rules or starwars rules) in your D&D 3.5 game. Frankly its a load of crap.
Just because I'm willing to make concessions for a fantasy genre doesn't mean I should have to be willing to allow any other kind of verisimilitude breakers, particularly if they are breaking the verisimilitude of the fantasy setting.
The sort of verisimilitude I'm going for is what is believable in a fantasy novel or film, such as a forgotten realms novel, or eberron novel, or MtG novel, or whatever. I dont want my D&D to have jedi in it. I dont want my D&D to include stargate SG 1 characters. I don't want my D&D to shove in gritty film noir carchases. I don't want my D&D to act like a boardgame, and the more boardgamey it is, the less fun I'll have.
It's not necessarily *My Failing* if I dont want it to play like tactics ogre or mario party. That just means that *THAT* is not the type of game I want to play.
Just like its perfectly acceptable for someone running a hard-scifi game to get peeved off when someone tries to say they have to allow the players to play as wizards, and magic breaks their immersion and gets in the way of the game they want to play, and the stories they want to tell.
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Ahnehnois: I couldn't have put it better myself. Exactly.