I can understand that, many times you can not be told of a retcon of that nature and the story doesn't change. But with the Flash, it's not the case. You'll run into the dead mom/jailed dad thing inevitably whenever his main villain, the Reverse Flash, appears. And when that's not happening, unrecognizable walking stereotype "Wally West" appears. Or "Bar-Torr". Or lame versions of the Rogues. The things people had been invested in, people who can't just "go with the flow" no matter which way it goes.