Four Save Model instead of Archaic Model

First, what is the Archaic Model of saves? That's what I'm calling the Save vs Poison, Death Ray, Breath Weapon, Wands, Spells, etc. Where you're supposed to use Breath Weapon for area effects and dodging stuff, and Poison or Death Ray is for save vs Death. It's convoluted, new players constantly have to have it explained to them, then they spend 5 minutes trying to find it on their character