Stop beeing such a dick about the shell of my choice!
If you just bash against something, without even presenting any arguments(no "ITS SOU MUCH BETTAAA!!!11eleven" ist not an argument!), nobody will even take you serious.
Also those kinda discussions are most of the time only religious debates. Bash 4 has many features and with the right tuning it's just another good shell like zsh. And don't tell me zsh is awesome out-of-the-box. I tried to configure it but there's like a gazillion options and after like 1/2 hour I just gave up and went back to my original shell setup with my petty-bash..