Most likely reason because if they've been seeing eye to eye, this would've been done a long time ago right? I'm not a programmer but I think that with the slew of developers that are updating bitcoin, this would've been done a long time ago right? I don't get the part where this isn't implemented yet though, privacy is what bitcoin advocates right? Then how come they're not yet putting this in yet? What's holding them up besides the speculation that devs aren't seeing eye to eye on this thing.