Here's a thought that I just had after reading the discussion and putting it together with a theory that I had. Say Kaladin, or someone with an Honor blade, took one of the "dead" shardblades with them into a highstorm, where they would have unlimited stormlight, could they then invest enough stormlight into the sword to bring that spren back to life to then seek out someone to bond to, thus eventually creating a new KR? If so, this seems like a way to "quickly" help increase the number of Knights to fight the Voidbringers. Maybe this would help the Stormfather be willing to let more of his children bond with humans in the first place,