There are (2) 737-800s and (7) MD90s that have not yet joined the fleet but don’t worry, they’ll be outfitted with Wi-Fi prior to entry into service.
was on a jfk-san flight tonight with no wifi on a 737-800... looked brand spankin new (or at least freshly refurbished).... there were wifi cards in the seatbacks, but no wifi logos on the overheads and no signal... the g&t's made up for it though!