Jack Daniel
dice-universe.blogspot.com
One (interminable) problem with these discussions of "old school" gaming is that the Primer emphasizes one facet of "old school" gaming -- rulings, not rules -- but actual "old school" gaming wasn't nearly so consistent.
Advanced Dungeons & Dragons, after all, was a pretty clear move away from this philosophy -- although, starting from "original" D&D, it was still, in many ways, a rulings-based game. So we had players describing how their characters searched for traps and treasure, and the DM making judgment calls with little mechanical support -- and then we had explicit rules for demi-human level limits and other esoterica.
Bingo. The Primer describes ONE way to play role-playing games in general, not THE way to play OLD SCHOOL role-playing games.