Where was Russias great cyber warfare teams? They wouldn't have held back against consumer devices.

From what I've read western agencies helped Ukraine and the cyber efforts were mostly neutered.

It's one thing to be a random org in peace time but in war the deep penetration into Chinese networks will have exposed plenty of Chinese efforts not yet disrupted and all that was super secret and careful before turns into open warfare.

So it's not like the west is going in blind. The US spends mountains on this stuff, not including the mass of western commercial infosec companies tracking these critical "threat groups" as their business model. NSA is huge as it is and who knows how many federal and DOD agencies have cyber mandates these days.

All systems are inherently vulnerable but some mass back doors in routers has been speculated to death by people way smarter than me and most I've read is that the risk is largely over stated to the civilian population. The router doomsday scenarios are always super hand wavvy in the details.