Yeah, you can view it as an optimization: you can build defstruct & co on top of lists with macros. However, using ca(d)*r by hand is not advisable in any case.

Yeah, you can view it as an optimization: you can build defstruct & co on top of lists with macros. However, using ca(d)*r by hand is not advisable in any case... Usually it goes the other way around: you implement lists on top of defstruct.