51 years old here an ex rangers fan who dropped them when my home state got a team. My friends and I all became Devil fans because of state pride. We are all in our 50's now and do not like the rangers!! So the Devils have plenty of older fans and younger fans like my 8 year old son. And YES I am happy the rangers lost and it happened on a Friday at the garden (another failure at the worlds most famous arena ....cough, cough) so ranger fans have a long weekend to think about it instead of beng distracted by work!
I'm a couple years younger than you but have a similar story. I was a huge Rangers fan back in the late 70s when they had JD, Espo, Duges, Maloney and others. I still remember watching the '79 SCF on my 13" black and white TV. Was so fired up when JD stole G1. Then Montreal won the next four. I still remember the disappointment. My switch to Devils fandom was a process that started a couple years after they arrived in '82. I think Duguay being traded to the Red Wings was part of it. By '87, '88 I was 100 percent Devils fan and never looked back. I don't buy the argument if you're above such and such an age, you can't switch allegiances.