I think the speed of light already has exceptions but this has nothing to do with light traveling anywhere so it is a non-sequitur to say this affects its speed.
Haven’t you figured it out yet? Almost everything that we know today is going to change tomorrow? There is no such things as facts in science.. It is just a matter of time until things change - usually for the better...
I just wish that I could live long enough to see those changes...
Yes... until someone proves different. Don’t you see the conflict? Science is a moving thing and will continue to be so until the end...