This is only a few ERC20 tokens, not all ERC20 tokens. I recharged some ERC20 tokens yesterday to sell,and bought some EOS. These are ERC20 tokens and they are completely unaffected.
I might be wrong. Are you sure EOS is an ERC20 token i thought they also have their own mainnet. I heard it is even an improvement to ethereum.
EOS is an ERC20 token
https://etherscan.io/token/EOS but the developer moved a step higher than the normal erc20 and that is why they are able to have their mainet and people can also create tokens from eos.
No system is extremely perfect without a loophole, it is nice that this is discovered at this time.