What can make scala more popular?

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I have tried to summarize discussion for our company(we use kotlin,java,scala):
And our checklist is

  • when you need jvm and statically typed language
    1. use java
      • when you write low level decision (application server)
    2. use kotlin
      • when you need high level decision(web app)
      • when there are enough standard arithmetic with java types(int,Bigdecimal,String, etc)
    3. use scala
      • when you need high level decision
      • when you really need custom arithmetic

There are options of course, it is just simple start point.
We specialize on data processing.
So if scala had successful whitebox macros or just external preprocessors I would have arguments against the second option.
It would be also usfull:

  • xml literals is deprecated
    It is useful sometimes
  • delayedinit is deprecated
    It is just argument for kotlin
  • symbol literals is depricated
    We need good dynamic mutable\immutable pojo
  • etc
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