Couldn't you make a similar argument about DO? I don't see a lot of value in "X is just Y and Z, why use X?" arguments. Clearly it has enough ergonomic benefit

Couldn't you make a similar argument about DO? I don't see a lot of value in "X is just Y and Z, why use X?" arguments. Clearly it has enough ergonomic benefit that people like using it. I definitely think the design of the DSL is a little chaotic, not to mention difficult to remember, and having two entirely different DSLs implemented by the same macro is downright ridiculous. But it's definitely good enough at its job and better than not having it at all. If it didn't exist, people would probably be DIYing their own (even worse) versions of it, without the assurance of it being part of the specification and ostensibly a well-tested part of any implementation.