I just bought Gamma World 1E on a whim -- I am prepping to run Modiphius' Fallout 2d20 RPG so I have post-apocalyptic on the brain -- and man I love the Old School vibe of game design. It is concise and thematic and esoteric and Gm facing and complete in 60-odd pages. As much as there are things about modern RPGs, both in design and aesthetic, that I like, they feel bloated and unwieldy and overwrought at times. Even OSR games fail at this, turning games like B/X (100 pages combined) into 2 or 3 times that length for no real benefit.
So, yeah -- old school games are really great.
So, yeah -- old school games are really great.