There's no compiler (and standard library implementation) that has faced public scrutiny like other popular languages have. Aditionally, there are no IDEs for Ada comparable to the IDEs of other comercial languages (e.g. C++, C# or Java). Which is understandable given how little interest there is in Ada, amongst the "general public" of developers, which is understandable given how there's no proper free implementation of for Ada.

There's essentially just the AdaCore implementation that costs $$$, the GPL'd AdaCore implementation that requires you to publish your source code (because of the libraries) and then there's some unsupported GCC implementation.

I like Ada, and I would like to see it gain more market share. If it had, things like Rust and Go may have been superfluous. But the way things are, I just don't see it happening. Unless you're some big enterprise Ada is essentially a non-option, due to licensing, and if you're a big enterprise it's essentially a non-option since there's very few devs around for it. And so it remains an obscure language used in very niche applications (albeit with great success there?).