It's not rare to see mailing list got hacked these days. Although this time it's more important since the website associated with Ethereum Foundation. I didn't subscribe to their email notification, but it's good that there's no victim (at least when that blog is written).
We can't really say that there are no victims, it's too early to say that. Just like the hack on on the emails of the subscriber of Ledger, it might take some time for the hackers to take advantage of that mailing list.
So just wait, maybe in the couple of months, there will be some who might fall for a phishing link or being scam because their email was exposed to this hacks.
Lucky are those who are not subscribed, but for those, you really need to be very careful.