"What I was blindly ignoring back in my teen years was games like Elite, Ultima IV, Zork, MUD - games that fit just fine on the tiny possibility space my original PC enabled."
I had a (slap back of hand) cracked copy of Ultima IV. No User Manual. No Map. No Potions Guide. I had to create my own maps of the world, and permute ingredients to figure out all the potions. I spent three of the most glorious weeks of my life completing that game, and, to this day (close to 30 years later) I recall the level, (you couldn't restore health in the midst of a dungeon) in which I ran into the mirror image of my party and had to battle myself. And riding the balloon over pirate bay. Oh my, ...