The SE3 isn’t a flop lol. According to some reports it’s selling better than the new 14 Plus. The SE line isn’t meant for everyone. It’s meant to cater to those who don’t mind the older design and want something that’s an iPhone on a budget. Also older folks like grandparents like the older design and home button as they may not want to adjust to the newer design, for them it’s a big plus and they get an improved chip, camera experience and battery life to boot! The SE just works and that’s all some care about, it was never meant to be a top seller.