As for features, you will find many aforementioned in multiple other languages.
My point is that when they designed kotlin, jetbrains has been unafraid to take inspiration and copy what works well in other languages. What helped is that they have in house specialists from every language out there. By following their example I can maybe discover useful design patterns
I'm not confusing anything.
When I look at Ruby on rails code, it gives me ideas that I can take with me in other languages that are not "related to Ruby".
I don't see it as a good thing that developers don't look at what other communities are doing.
I edited the first sentence of my post.
I think your post is valid and certainly something I asked myself a few months back. I love the look of Kotlin and I use typescript as much as not.
Another language which you might find interesting is Lua, it has a fascinating community, syntax and backstory.
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