Concepts are significantly simpler to implement & check. I did a non-trivial amount of coding both with TMP-concepts, and with ConceptGCC. ConceptGCC produced b

Concepts are significantly simpler to implement & check. I did a non-trivial amount of coding both with TMP-concepts, and with ConceptGCC. ConceptGCC produced better error messages earlier, was easier to symbolically debug, and produced better text, all with less & easier to read & understand code.