Sleep deprevation is no joke. Parents of newborns will see a massive cognitive decline. It took me 6 months to recover from my first child who didn’t sleep through the night until she was 2.
I still have not recovered my abilities from before having a kid. I’m just tired all the time and can’t think at nearly the speed I used to. Kid is 2.5 now so hoping we find some balance when Covid is “over” (haha yea right).
Sleep deprivation had gotten to me this year (for unrelated reasons). I remember at one particular, my AC had died and I was waiting for someone to replace it and I hadn't slept in few days. By mid day it was so hot and stack with the sleep deprivation it was incredibly disorienting. I remember laying in bed hoping I could catch an hour of sleep but never fully falling asleep, just sweating and unable to think straight. The combo made it feel almost comparable to some moments from a bad trip.