What can Nim learn from Crystal

[sky_khan]

This is what happens when you try to use that 7 years old unmaintaned repo
    
    
    interfaced.nim(40, 39) Warning: Deprecated since version 0.18.1; All 
functionality is defined on 'NimNode'.; symbol is deprecated [Deprecated]
    interfaced.nim(40, 24) Warning: Deprecated since version 0.18.1; Use 
'strVal' instead.; $ is deprecated [Deprecated]
    interfaced.nim(41, 41) Warning: use `getImpl: NimNode -> NimNode` instead; 
getImpl is deprecated [Deprecated]
    interfaced.nim(126, 28) Warning: Deprecated since version 0.18.1; All 
functionality is defined on 'NimNode'.; ident is deprecated [Deprecated]
    
    test.nim(45, 21) template/generic instantiation of `toAnimal` from here
    interfaced.nim(107, 17) Error: expression cannot be cast to 'RootRef'
    
    
    Run