I always find it odd that crew or passengers would expect a day flight eastbound across the north atlantic to turn into a pseudo night flight - AA90 , for example, departs at around 09:15 and arrives 7.5 hours later at 22:45
Do many people sleep all night, then sleep for 7 hours and then go to bed?
There may be some that have connected from afar and may be off on sleep time, but if that tired can still nap in the daylight
there are plenty of night flight options for those who want to be in darkness on an aeroplane