Why did Ada fail?

The recent thread about alternatives to C got me thinking. Why did Ada never catch on? It seems to be in every way the superior of Java, Sepples, and other ENTERPRISE evolutions of C. It is probably the safest language in existence, and almost documents itself. If I recall correctly it is also relatively fast.

1. Lack of an OS written in it to dominate the entire academic sphere.
2. Lack of a gigantic silicon valley company previously making niche market hardware relying on it to take Microsoft on.
5. Lack of Microsoft Visual Ada.
8. Lack of being named after a snake.
6. Lack of being shit.