I have used Ada during 8 years (3 years as student, 5 years work). The failure of Ada is the idea that "development of reusable libraries is left as an exercise

I have used Ada during 8 years (3 years as student, 5 years work). The failure of Ada is the idea that "development of reusable libraries is left as an exercise for the developper". Standardisation of libraries was very slow and/or incomplete.