[rwj]

Except that all the people using left-pad weren't paying for left-pad, and didn't have a contractual relationship with the author. IANAL, but I'm doubtful the courts would find there is enough of a relationship for the author to be liable.

[withinboredom]

That is what new laws are for.

[mjr00]

No, they aren't. Even in the most liberal interpretation of the new laws, there's nothing specifying that you need to continue making your open-source package continually and indefinitely available.