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Re:Ask HN: Has anyone here programmed in Kotlin? What do you... by J0-onas on Saturday July 25, 2015 @06:58AM (#9947210)
Im guessing making somwhat radical decision that are not backwards compatible.

However, Python 2/3 is a better example for breaking backwards compatibility.

Re:Ask HN: Has anyone here programmed in Kotlin? What do you... by DennisP on Saturday July 25, 2015 @12:30PM (#9948071)
I just started learning Swift, and I keep running into stackoverflow answers saying "Here's how it worked in 1.0. In 1.2 you have to do this instead. But in 2.0 you do it this other way."