It’s probably not relevant to the question in the OP, but a mesh between routers makes sense in a dynamic routing scenario. If you have a mesh of routers running iBGP for example, you will always have a path to other routers in the network even if you lose one and the routing protocol will select the best path to the destination network based on what’s available.
Also, if we’re talking about devices on the same broadcast domain (like multiple APs serving one SSID), you don’t need a router to forward that traffic. Everyone on the same layer 2 segment can ARP for each other, so it’s not a bad idea to just let your L3 devices L3 and let your L2 devices L2. If there is an issue with connection quality, solve that :)
It’s probably not relevant to the question in the OP, but a mesh between routers makes sense in a dynamic routing scenario. If you have a mesh of routers running iBGP for example, you will always have a path to other routers in the network even if you lose one and the routing protocol will select the best path to the destination network based on what’s available. Also, if we’re talking about devices on the same broadcast domain (like multiple APs serving one SSID), you don’t need a router to forward that traffic. Everyone on the same layer 2 segment can ARP for each other, so it’s not a bad idea to just let your L3 devices L3 and let your L2 devices L2. If there is an issue with connection quality, solve that :)