In view of the massive amount of work to actually deal with it, it would actually be useful to know how large an attack surface this vuln exposes.
Many of the man-in-the-middle classes of vuln are more of a theoretical risk than one which is often encountered in the real world. Though, WiFi is more prone to this class of attack than wired connections, simply by nature of the fact that an attacker can connect without gaining physical access to the hardware, or sometimes even the premises.
Not yet seen any lowdown on this. Is it feasible for anyone other than an expert hacker to exploit it in the public sphere? Would this only be possible in some circumstances, or in all? How long would such an attack take?
One of the key problems I foresee, is that upgrading router firmware often involves the loss of all settings. In which case it can't be done remotely, and might involve a lot of manual work reinstating the settings if the site has services on it. Not just for WiFi but for all router functions too.
Point of fact, this debacle strongly suggests the use of standalone WiFi APs. Integrating them into routers creates a domino effect outage. At least I'm on separate units here so I can just chuck the (fairly old) AP away if I need to.