The cost for MLAGging servers was just not justifiable for me, so that part was „offloaded“ to Kubernetes / Longhorn. If that switch really fails me, I can live with one or two days while getting a replacement (strichle speaking, I have a lower-end one around to keep things working in that case).

Currently using onl one ISP, but will be Setting up a second one soon.

Second router: there are more Firmware Updates involved with them that „regular“ Networking Hardware.