The problem is most of the router companies have now locked down their update mechanisms on newer hardware, per FCC request... (the FCC wanted to prevent bumping the wattage, but easiest path was to lockdown updates).

Asus was really nice for a while, one of the more open mfg's, my AC3200 unfortunately came out after the lockdown, and is unsupported... would love to get back to tomato-usb or similar.