The jump from Java to Kotlin is a lot less than the jump from C to C++. 75% of Kotlin is just syntactic sugar for things you are already familiar with in Java (

The jump from Java to Kotlin is a lot less than the jump from C to C++. 75% of Kotlin is just syntactic sugar for things you are already familiar with in Java (things like defaulting to public access), so those are really easy to wrap your head around, and the remaining stuff isn't that far removed from what you're used to. Going from C to C++ on the other hand is introducing OO concepts, and then there's the STL which is basically an entire second functional language on top of C++.