I learned about scala from my friend in 2013. We were just talking about some fun stuff. I really liked the language for its conciseness and power. But there was no new project in our company where scala can shine. In 2015 we decided to migrate 4 000 000 loc from pl/sql in oracle into some jvm language to work with postgresql. We needed high performance multithreded system with very simple and safe gramma in code to prevent server crashes from human errors.
In that time there were just no other alternatives, scala gave us many tools to write efficient code safely and fast.
Scala allows us to create really safe sandbox for developers.
Thank you.