I don't know about wearing orange all the time, but I could see the wisdom of having something lightweight and bright colored in your pack that you could put on or deploy for visibility if you got injured or needed rescue. I guess the trouble is that if you fell or were unconscious you might not be able to put it on.
I've thought about one of those emergency beacons like a Garmin InReach or similar. I had a nasty fall going up a boulder-filled creek bed just south of the powerline cut near Stoneface. I just got all skinned up on one leg when I stepped on an unstable rock, but it could have been a broken leg. I don't know if there was any cell signal in that spot or not. I did have orange on that day because it was deer season, but where I was at it might have taken awhile for anybody to come close enough to see or hear me.