This is both anecdotal on observations and subjective on the assertion that rust is better than C for MRI. Also rust adoption is yet to bear out and speculation

This is both anecdotal on observations and subjective on the assertion that rust is better than C for MRI. Also rust adoption is yet to bear out and speculation at best that rust would bring more contributors. A good comparison point might be Rubinius or JRuby to see what a non-C approach does for contribution.