Most folks don't seem to realize it, but defaults play a big role. Even though ZSH is the default shell on macOS now, many prefer to go back to good ol' Bash. I suppose that having superior software does not guarantee success in a popularity contest where compatibility is crucial.
@nixCraft the inertia problem is both very annoying and very hard to beat. It's not like C, C++, Java, C#, Ruby, Python or especially PHP are popular because they're any good compared to their modern competition, it's just that shifting the entire ecosystem built around them is harder than continuing to bear with them.
