>Does Clojure have a package manager as simple and straightforward as npm/cargo? Does it have a type system as well-maintained as TypeScript? Does it have a UI library as good as (choose your favorite web UI library)? These are all ecosystem problems.

The irony is Clojure(script) has all those things. By virtue of being hosted on the JVM and Javacript and having first class interop with both. ClojureCLR even gives you access to all of C# etc.

Being hosted was a great play in terms of ecosystem.

What it doesn't have is ALGOL style syntax.