I haven’t tried to use hamachi in years so I’m not sure about a solution to your problem. However, I can strongly recommend Zerotier as a potential alternative

“Oh, I have an opinion about this.”

“Wait, my opinion has already been covered across a few other comments. No one will care about another echo in the chamber, I’ll delete that and just upvote those other comments and move on”

I do the same thing but leverage networking instead of Linux.

“Sorry, I dont actually know much about computers, but let me know if you want advice about port trunking or configuring a VLAN”

Wired communications would take over immediately and it would be a massive pain in the ass, but we’d ultimately adapt.

If the EM jamming is enough to also degrade the signal in copper lines, which at 1000x the strongest signal, might happen, then basically all modern society would collapse within 48 hours