Not been on a 757 for years but expecting one for my LAX to HNL leg ( and return ) this July with Delta; now that is proper over-water, but in a proper plane.
Maybe it is down to me being a bit older but the length of time over water has crossed my mind a few times.
Did nrt to Hnl in United 747s and sfo to Hnl on United dc10s in the 1980s; not a worry. Did United sfo to Hnl in 1998 on my honeymoon but can't remember the metal.
Didn't even think about over-water on LCY-JFK BA but I'm a bit worried about the Hnl leg.