Have you ever seen a tabletop RPG explicitly, specifically state something to the effect of "This system is meant to accommodate character optimization and tinkering around with different character builds"?

Have you ever seen a tabletop RPG explicitly, specifically state something to the effect of "This system is meant to accommodate character optimization and tinkering around with different character builds"? If so, how did it follow through on such a statement?

To be clear, I am asking about tabletop RPGs that explicitly, specifically state such a thing themselves, independent of any "community consensus," personal recommendations, or the like.