“Usually startups choose highly productive language”- This is called false economic.
Artur
1

Artur, I agree with your thought, but statics says something different. Here is the startup report from AngleList. I personally feel that choose technology or language based on your need. which type of product you are building and what scale you are looking in near future.

Observations:

  • For great companies, the most popular languages are Javascript, Ruby, Python, and Java.
  • For okay companies, the most popular languages are Javascript, Ruby, PHP, and Java.
  • The likelihood that PHP is being used is strongly anti-correlated with company quality.
  • The better the company, the more likely it is to be using modern and/or functional programming languages (i.e. Go, Scala, Haskell, Erlang, Clojure).