Now I am getting really confused... This asus page says the RT-AC68U doesn't support aimesh:
https://www.asus.com/us/support/FAQ/1035163/
But this page states it does:
https://www.amazon.com/ASUS-Dual-Band-AiMesh-Router-AC1900/dp/B00FB45SI4/ref=psdc_300189_t3_B01LXL1AR8
and this page shows it:
https://www.asus.com/Networking-IoT-Servers/Whole-Home-Mesh-WiFi-System/All-series/filter
https://www.asus.com/us/support/FAQ/1035163/
But this page states it does:
https://www.amazon.com/ASUS-Dual-Band-AiMesh-Router-AC1900/dp/B00FB45SI4/ref=psdc_300189_t3_B01LXL1AR8
and this page shows it:
https://www.asus.com/Networking-IoT-Servers/Whole-Home-Mesh-WiFi-System/All-series/filter