Is this only in zsh? I've been recommending this and not marking it explicitly as a zsh thing. alt-. works too. In the shell ESC <foo> is the same as alt-<foo>

Is this only in zsh? I've been recommending this and not marking it explicitly as a zsh thing. alt-. works too. In the shell ESC <foo> is the same as alt-<foo>. The difference being that with alt-<foo> you hold alt and press <foo>, then release them both. with ESC <foo> you press escape, release, and then press and release <foo>.