Zsh vs Bash: Differences and When to Switch
Zsh is the better interactive shell, and bash is the safer choice for scripts, because zsh does not follow POSIX by default and runs some scripts differently. Zsh completes abbreviated paths, corrects typos, and shares history between sessions. Typo correction and shared history are off until you enable them. Without a config file, both shells start in 2 ms on a ThinkPad X9-15 Gen 1 with Intel Core Ultra 7.