I heard that only 33% have done this. I used a more paranoid method of creating the public and private key pair (there's a set of 4 commands that I used in Terminal) on an airgapped machine and then registered in MEW.

However, it appears that NS James has actually come up with a method for all those who have EOS on ethereum addresses to generate EOS keys for those who forget.

-A new way to convert Ethereum private keys to EOS private keys within @Scatter after the snapshot

It's better to be proactive. The issue is discussed more than half way into the video (sorry I don't remember the precise time). That won't help those who don't have keys though in which case, you're relying on the mercy of those who do.