Hydration has good connotations though. Hydration is healthy and good for your skin. If you'd used an adjective like "waterboarded" it would have less marketing appeal.
If you use too much moist code, is there a risk of getting a soggy bottom? Considering how many names seem to be derived from memes these days (all the -strikes and so on), a language that guarantees " safety" as a metaphor for correctness would probably do well.
You'd hardly see people rallying behind concepts like pure functions or clean code if they were called brown functions or moist code.