I missed this shout-out of the #Librem5 at the beginning of the month (in French): https://securite.developpez.com/actu/268330/Les-USA-veulent-proteger-leurs-reseaux-electriques-contre-les-cyberattaques-a-l-aide-de-technologies-retro-comme-des-interrupteurs-manuels/
Apparently #Purism using #lotek switches aligns with the US Government's approach to power grid security.