Rust hasn't had a much bigger adoption until a while ago. It had a better open source presence perhaps, but not necessarily adoption. It changed now obviously.

Rust hasn't had a much bigger adoption until a while ago. It had a better open source presence perhaps, but not necessarily adoption. It changed now obviously. I guess the question is, does it really need to be mainstream to be usable? As long as it works for the usecases you need it for, popularity isn't a necessary factor. I have to say though that D has some issues that prevent it's wider adoption, both historical and current. Some are obvious, such as unnecessary two standard libraries conflict (I missed out on it, but the OOP person in me would have preferred Tango over Phobos).