That is correct. The email exporter doesn't work, so the jackass wasn't able to escape with email addresses.
It is also correct that we lost a "day's worth of posts", give or take a few hours. As far as outcomes go, it wasn't too terrible.
Changes have been made to at least close the hole used by the jackass (they don't rise to the level of 'hacker' in my view).
If you care about your account, I strongly urge you to use a
complex password that you do not use at any other site, and that you enable 2FA for your account. You can have the code sent to your email, or you can use an application on your phone as your second 'factor' in authentication. If you're doing it with your email, and I can't stress this enough, do not reuse the same password you used here.
Even though the passwords here are almost certainly salted and hashed, they can still be recovered with something known as a 'rainbow table attack'. Then, one of the worst things people do is use the same password for multiple accounts. That's a horrible idea, for what should be obvious reasons.