No so. Many people use it in production. The language has been around for 7 years and a stable 1.0+ release for over a year. It's very much more mature than swift and rust and certainly sibling to go in that regard.
I tried to explain exactly this before and a lot of people didn't get it. 1.0 doesn't mean anything, JetBrains spent so much time to make something stable and good. That is why kotlin didn't suffer of the big changes swift suffered since its 1.0. (because kotlin suffered those changes before 1.0)
