Comment by pron

Java's syntax is just as friendly and simple -- see my other comments on the subject -- it just requires the receiver to define a policy, which is essential for security. You only need to use STR when the receiver does not define a template processor and works with strings. I have no idea what Python's or JS's security experts advised, but that code injection is one of the most common vulnerabilities in memory-safe languages is a fact reported by all security advisories. String interpolation is one of the most dangerous features a language can have.