The Crimson Binome
Hero
It's worth remembering that there were many different methods of stat generation presented, throughout both PHBs and DMGs and supplements. Rolling an 18 is far from an unlikely event, even if you're rolling fairly, and I know at least one method allowed you to point buy your percentile.Yeah, but it's worth noting that, if you're actually playing 1e/2e fairly, 18/00 strength should see play perhaps once in a player's lifetime (in my 30 years of experience, I've seen it rolled exactly once).
In my personal experience (with late-edition 2E), percentile Strength only showed up if you found Gauntlets of Ogre Power. Aside from that, anyone who rolled an 18 for Strength would just choose to play a half-orc, and skip straight from 18 to 19.