Bash is depreciated in favor of Zsh in Catalina. Regardless of you where you get bash from, I prefer brew, a nag message is presented to the user about Zsh ever

Bash is depreciated in favor of Zsh in Catalina. Regardless of you where you get bash from, I prefer brew, a nag message is presented to the user about Zsh everytime a terminal session is initiated: The default interactive shell is now zsh. To update your account to use zsh, please run `chsh -s /bin/zsh`. For more details, please visit https://support.apple.com/kb/HT208050. The export I provided prevents this nag message from being displayed for Bash users.