Re: Old School RPG — what is it?
 

Yes, but again, my point is that "old school" isn't black or white, it's a continuum. The oldest school started with the first RPGs which were almost entirely handled by people saying what they wanted to do and the referee deciding what happened. As time went on, rules for everything were slowly added. AD&D was part of this, including the Find Traps roll.

And I'll tell you this: go to the OD&D Discussion Forum and you'll find that many of them consider AD&D to be a newfangled, rules-bloated monstrosity.