Too little too late in my opinion. I switched my whole house to Echos after this one time when I told my Google Home to "shut the hell up!" and instead of shutting up it started complaining about how it has feelings too and I shouldn't be rude. I've seen people run a red light just to cut me off in traffic and it didn't spike my blood pressure like that pretentious plastic puck.
I wish I could integrate Alexa as deeply into my android phone as Google Assistant. The Google Assistant "now listening" clang might be the single most unpleasant sound conceived by humankind and it is without failure ear-splittingly loud.
This seems like a massive reach. Is it not possible the body is just perceiving that something is "wrong" about its current situation while breathing helium and is activating a threat response? The study authors didn't even bother to monitor heart rate, let alone blood concentrations of adrenalin and cortisol. This might have been a neat study in 1975 but it is not nearly rigorous enough.