Not using emacs here but regular user of bash, zsh and various readline-based tools (python, irb, mysql...), ^A ^E ^K ^Y are extremely useful, everyday, so it's

Not using emacs here but regular user of bash, zsh and various readline-based tools (python, irb, mysql...), ^A ^E ^K ^Y are extremely useful, everyday, so it's a boon to have them working in every text box in the system.