Funnily enough, I find that the autocorrection tends to get in my way more often than not. Being prompted if I meant 'git' when I type 'gut' interrups my thinking flow, while 'command not found' doesn't. And the autocorrect is very bad for cp/mv ('mv test test1' will likely ask me if I meant 'test' instead of 'test1').

That being said, I'm a happy zsh user, for all it provides. Autocorrection is just one of the only things that, in my opinion, don't work well, so it's strange to market them.