A modern programming language that makes developers happier.

kotlinlang

As they pointed out, they conflated optional trailing commas and optional commas in general in the options, which means they can't read too much into those. I don't think anyone wants the latter, but I think the former would be really nice
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All commas are optional is not implementable. It would be a breaking change to the language.
```
listOf(1
+2) == listOf(3) // now

listOf(1
+2) == listOf(1, 2) // after
```
Optional trailing commas FTW.