Constitutional crisis
You thought I was gonna get all political, didn't you? But no, I just want to talk about Constitution in basic D&D, and how it's at least a little bit broken. Constitution, as written in B/X and BECMI D&D, has a much larger impact, for good or ill, than other ability scores. These editions use a modifier scale from -3 to +3. Most modifiers are applied to a d20 roll, meaning they can have, at most, an impact equal to 15% of the die's maximum. That makes a + or -3 modifier nothing to sneeze at, but it's not big enough to render a character either unplayable or insuperable. Constitution, though, tacks that -3 to +3 modifier onto rolls of d4, d6, or d8. Despite the huge disproportion, nobody ever complains about piling a +3 on top of a d4 at each level, even though it more than doubles the average hit points of such a character (2.5 base, 5.5 after +3 modifier) and it's not really a huge deal to have an exceptionally hale and hearty magic-user have more hit po...