I understand your concern. I feel just the opposite. I got converted into a zsh user (zsh is one of the common login shells) in the early 1990s and my login scripts have been more or less unchanged since around 1996. I use Solaris and RHEL desktop and servers at work, Mac OS X at home now.
Coming up in a couple of months, I'll be celebrating my first quarter century of running Unix at home.
I think I started playing with it after 2003.