See, e.g., https://madsciblog.tradoc.army.mil/156-what-is-the-threshold...
> responses are usually proportional to and in the same domain as the provocation
Which is both good and bad at the same time. Cyber warfare has been significantly impacting our economies and our citizens - anything from scam callcenters over ransomware to industrial espionage - to the tune of many dozens of billions of dollars a year. And yet, no Western government has ever held the bad actors publicly accountable, which means that they will continue to be a drain on our resources at best and a threat to national security at worst (e.g. the Chinese F-35 hack).
I mean, I'm not calling for nuking Bejing, that would be disproportionate - but even after all that's happened, Russia and China are still connected to the global Internet, no sanctions, nothing.
This subthread started with "is this issue a valuable exploit". Needless to say, if you need to invoke superpower-scale cyber warfare to find an application, the answer is "no". Russia and China have plenty of options to "take out" western infrastructure if they're willing to blow things up[1] at that scale.
[1] Figuratively and literally