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.

>>30
C#
Born of a lawsuit by Sun Microsystems, this proprietary clone of Java was Microsoft's vision of the future of vendor lock-in and uniplatform incompatibilities.
Python
"Good" according to people who have never used a language higher-level than C.
Ruby
Made by a Japanese guy so it's popular with waps and hipsters.
Matlab
Universities get kickbacks for shilling for proprietary software.
HTML5
A distraction so browser developers can have fun implementing incompatible variations of an unfinished spec instead of fixing bugs and memory leaks.