At the same time, in college we are teaching our students Java and C++ because that's what companies expect our students to know. Half our CS curriculum is in Java. The students I teach loathe C and C++ and want to learn Rust, but we won't teach it to them except in an experimental elective that won't count toward their graduation. So it's hard to say how many young programmers out of college actually know these "new hot languages".

I totally agree with you on this comment since as I college graduate I learned Java , C++ ,C and python but I was exposed to Golang and Rust through online discussion forums.

Plus most of the organizations still write code in matured languages such as C,C++ and Java.

I don't think so. There is a full load of people with experience in C++ or Java, but people with experience in performance critical (whatever that means) Rust code is more limited for being a newer language. You however win on the hipness scale and attention in places like hacker news.

As others have said, however, a big factor certainly is that an internal lead developer lobbied for Rust, which they experimented with.