1) Ur/Web makes programmers more productive by providing abstraction and modularity features not found in any other language.
2) Ur/Web provides guaranteed security; certain kinds of security vulnerability are impossible. For example, modulo any compiler bugs, any Ur/Web application that the compiler accepts is free of code injection vulnerabilities.
3) Ur/Web provides much better run-time performance than any competing system. Server-side components are native code and don’t use garbage collection.
Ur and Ur/Web were considered as beta software by the developers until recently, but the new December 2014 release is considered as a candidate production version."
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