For the latest Kali Linux 2020.1, released yesterday, the developers have decided to go with a traditional default non-root user model. Other changes in this Kali Linux release include a single installer image instead of separate images for every desktop environment, rootless mode for Kali NetHunter, and more.
Kali Linux is a Debian Testing based Linux distribution created for digital forensics and penetration testing, which comes with hundreds of tools preinstalled.