Remathilis
Legend
Obviously we have never played together (you cannot just predict the scores on my characters just form class alone), and in 4e hitting is just way too important, but for example Battle clerics can dump Wisdom, 3.x allows for more room: crossbow fighters can have any kind of str score (including 8), "showy" rogues can have a dex as low as 13, blasty and gishy sorcerers even get away with having 14 cha, I've played paladins and know of rangers with a wisdom so low they don't get to cast spells, monks are so mad they don't have a single primary, even 2e with it's score requirements to be a class allows for some pretty low scores all over the place. It all comes to playstyle, of course in a charop heavy game you'll never see such characters, but they exist in more story and character driven games, and it is exactly there that such a steep and harsh requirements/restrictions hurt the most. I don't doubt some groups will need a way to stop endless dipping, but ability score requirements fall short on them (really, the current restrictions allow for a 9 class dipper while greatly restricting the ability of any non-optimized character to get a second class)
My group is as far from "optimized" or "charop" as you can get, and we still fall under the predictable lines. A fighter with a high strength (we tried some dex-based fighters early on, the fact they tended to be weak as heck limited their use until the Swashbuckler from CW). Even archers had decent strengths and mighty bows ("crossbows are wizard weapons"). Likewise, I can't imagine a caster with a low caster stat due to how DCs worked. I really don't think it would ever cross their minds to have a rogue with a higher str than dex or a druid with a high str/con and dumps wis.
I'm sure there is room for a farmboy who is drafted into the army and later finds God (13 str, 12 wis fighter/cleric) but I'm also fairly sure they are the minority.