If I want to put a wireless router in each room of my house, where each of the rooms has a wired ENET port, what is the recommended approach? Do I need to worry about AiMesh?
The Asus AiMesh approach using Asus routers that support AiMesh would be:
ISP/modem <wired> AiMesh router <wired/wireless> AiMesh node.
Connect wired/LAN and wireless/WLAN clients to any AiMesh router/node. Add an unmanaged switch where you need more wired/LAN connections.
Some Asus routers can serve WiFi to a "very large home", so you may only need one or a few such routers to cover your home. Too much WiFi is not a good thing, so don't buy/install more than you need. One in every room is too much unless the rooms are concrete bunkers.
Given existing wires for use as wired backhauls, you would only need dual band routers.
Consider the RT-AC86U or RT-AX86U for the AiMesh router node. And same or lessor RT-AC68U or RT-AC66U_B1 for the remote node(s). But if you only need one remote node, get two of the same AC86U or AX86U for easier maintenance and hardware backup.
The AX86Us have 2.5 Gbps ports so if your existing wires are capable, you could could wire 2.5 Gbps backhauls vs. 1 Gbps.
Map out the ISP/modem and router location and general node locations to know how it all will interconnect with your existing wires/layout.
Protect the ISP/modem and AiMesh router with a UPS for good measure network stability and data security.
OE