For routing, x86 is going to have the best perf for CPU intensive tasks like QoS. For wireless, mediatek is well supported upstream. WiFi is wifi 6 only though. Wifi 6E and 7 are in the works but will take a while to stabilize. My set up is an old lenovo thinkcentre nano IoT box as the router and netgear wax220 as AP, both running openwrt.