I just don't store credit card details in my browser. Auto-complete for emails is extremely handy and I use that all the time, but does purchasing things online really need to be any easier?
I don't mind reaching for my wallet there; it forces you to make a conscious decision to spend the money, which is at least slightly better than a 1-click impulse.
Credit card details are not the main concern here (because they are separated on Chrome), but you could send your address and phone number to a server without expecting to send more than your name or email address.
True and it takes what? 1 minute of typing? Do we really need to go faster than that? Of course, companies are all in favour, but it's not in our interest.
I don't mind reaching for my wallet there; it forces you to make a conscious decision to spend the money, which is at least slightly better than a 1-click impulse.