Wildstar did fail, however the rest of them are doing fine and are still receiving updates. Whether you enjoy them or not is an entirely different conversation, however they are all still alive and doing well enough to receive updates...which is the opposite of failing.
SWTOR isn't going anywhere any time soon, which is good and bad. It's certainly not dying, but it's not receiving updates very quickly either, and the updates aren't substantial as you noted, but again...it's FAR from dead.