[IshKebab]

It was held back by all of the compilers being commercial for a long time.

Also the main advantage it has over C is safety, and nobody really took that seriously until recently (and it doesn't really have an answer for use-after-free which is a huge class of bugs).

[shrubble]

The GNU Ada compiler has been out for decades and was integrated into GCC by 2002.

[augustk]

The same thing happened to Bertrand Meyer's language Eiffel.

[technion]

Two separate classes in my University course was entirely done in Eiffel, I came out with the view it ran businesses everywhere and then never heard it again in the 25 years between then, and reading your comment above.

[bigger_cheese]

My intro course at university was also done in Eiffel, this was at the ANU in early 2000's

[Khaine]

My university's intro course was in Eiffel. For my year they switched to java