In researching Controlled Atmosphere Killing, I thought to myself that getting the world's slaughterhouses to convert en masse from electric immobilization systems to CAK systems might be the greatest realistically attainable accomplishment one could contribute to in one's lifetime.
After reading this Peter Singer article on advancements with in vitro meat, I'm a bit less sure. If in vitro meat becomes mainstream first, then there may be no need to prioritize a CAK revolution. Both changes could definitely work in tandem to do more good than either change on its own, but the existence of other good methods lessens each method's Utilon Share Value.
Considering the multiplicity of sorta realistic ways to reduce animal suffering in factory farms, each individual method is less of a priority. The fact of there being multiple upcoming technological saviours to a problem is also a reason to shift one's belief in that cause downward, as there is likely to be an abundance of attention and funding in that area.