Although my intuition would seem to agree with you, Ada is still heavily used in industries where programming errors are fatal like avionics, medical devices, m

Although my intuition would seem to agree with you, Ada is still heavily used in industries where programming errors are fatal like avionics, medical devices, military, space, automotive. None of these industries typically like to operate in public view so I believe there is a reasonable argument that Ada may even be underrepresented in most indexes.