"There is a secret known only to parents of twins, medical residents, and Alexey Guzey: the human body does not actually need sleep. After 31 hours awake, you get an integer overflow in God’s database and go back to being well-rested again. Also you gain the ability to see angels." LOL. Amaze. On that note, I've heard some amazing things about the Snoo. It was banned from our house because of Luddit-ian reasons, but…
I agree that there's no genuinely useful bonding happening in the dead of the night when you're so sleep deprived that you might be hallucinating. It's just base survival after a certain point. I used to run dual feedings overnight with bottled milk so my wife could keep resting as much as possible. I used to time myself and optimize the hell out of it so that I could get back to bed. I would set alarms to wake myself up, get the milk from the fridge, warm the bottles, get the twins out of the Snoo and into their tandem Boppy, soothe them, feed them, change diapers, re-swaddle, and then get them back to bed, clean bottles, make sure the next round of bottles is prepped. I could run all of that, when everything went right, in just under 30 minutes. If the twins were fussy, the dogs woke up and wanted to go out, etc., it could creep up to an hour. I remember my hands being so dry from washing bottles that my skin was cracked and bleeding. We eventually got rid of all of the fancy bullshit and opted for bottles, etc., that had the least number of parts. That entire first year with twins is still mostly a blur today, 4 years later.
I went through basic military training and spent some time overseas in war zones. I've gone through sleep deprivation training and the real thing overseas. With kids, though, you've got a physical, mental, and emotional component to it that nothing can really simulate. It's draining in ways that are hard to describe, even to other parents who are in the trenches around you. You learn a lot about yourself, and your partner, and friends and family, but I don't remember much bonding going on during those late night sessions. Just a lot of wishing and praying that everything goes right. But maybe that's just the holes in my memory.