Exactly. If we presume Alice’s nsec is the only one compromised, and if she discovers the problem quickly and if she tells her close associates of the problem, and if a handful of them get the word out quickly using their uncompromised nsecs, then we have a relatively effective solution that can be implemented rapidly. Over time the new nsec would rebuild the old connections, but there’s no need for that to happen overnight.

Because if a big client gets compromised there will be many compromised nsecs.