Two years ago, Chinese company CCMT bought SuperSU from Chainfire. This does not mark the end of Chainfire’s adventure with Android, and he has expressed an interest in Kotlin and Swift. Both are used for Android app development. He only recently launched https://desktop.firmware.mobi/
src - https://www.xda-developers.com/chainfire-retires-supersu-february/
origin - http://www.pipiscrew.com/?p=10359 chainfire-devices-and-firmwares