[haroldadmin]

While I really like Kotlin in general, I'm not a fan of this feature. It feels like unnecessary syntax sugar for functions that accept multiple parameters.

Replacing a function call `foo(bar, baz)` with just `foo()` by bringing `bar` and `baz` into context is not meaningfully better in any way. I'd even argue it reduces the readability of the code due to implicit receivers.

[MrBuddyCasino]

First thought when I saw this feature was "no please not another Scala-ish" feature. Don't like "with()", don't like scope function naming (always have to look them up), don't like functions with expression bodies (without curly braces).

These features encourage chasing after diminishing marginal return in aesthetics and conciseness, taking up developer time that would be spent better elsewhere. They are also needlessly complicating the language and IMO don't carry their weight.

[gorjusborg]

I have used Kotlin in production for a while, and I like it for its immutable by default stance. I also like that Kotlin makes it at least appear to allow functions as first class constructs (outside of a class). Its type system is very nice as well.

However, I do feel like Kotlin has too many features as a language.

What I'd really like to see is a typed functional language with a minimal feature set, and that's how I use Kotlin. That said, using a language subset within a lang that has a large surface area tends to fall down over time. Team discipline can only go so far.

[MrBuddyCasino]

The C++ conundrum. Restraint and discipline is a rare trait among language designers it seems.