Open source router firmware project OpenWrt ships its own entirely repairable hardware
(www.theregister.com)
The LAN and WAN ports aren't labelled as such on the device and can be configured to do anything. The 2.5Gb port can also be used to take in PoE so for a lot of people - myself included - this will be the only port that's actually used, or at least the port that will be used the heaviest. The reason, I think, that it's configured as WAN by default is so that the LAN port can be used to plug a laptop in directly without disconnecting the whole network.