Saw the message from @guix about a potential security issue this morning. did a #guix pull and deployed to my #guixrouter, problem was fixed within 10 mins of seeing the announcement. So great for an internet facing device. My previous Raspberry Pi 4 device running the Pi OS got updated rarely because of the difficulty of doing it while keeping network online (2 or 3 times in 5 years). This is a substantial security improvement for me.
network downtime was a few seconds.