Your ideas around uptime are still in the 70's. Systemd updates require reboots. Then there's Spectre and Meltdown BIOS updates, gotta reboot for those. Oh and the SSD and NIC firmware as well.

To think we formerly only had one devil in glibc. Now everything is constantly being updated and it's fine. We've moved on from the uptime as phallic measuring stick mantra. Patch, reboot, and stay secure.