I'm only 42 yrs. old, but the plastic or rubber flipper rests with the sticky on the back have been around since I can remember. That's about as old school as it gets in my opinion. Think of it like the Amish do, any technology that's at least 20 years old is Ok to use by their standards, so I'd kinda use that as the same rule of thumb as far as traditional goes. Unless your a die hard who likes to rough it, then you can go all out selfbow made from a single piece of wood, cane arrows with rock points, and feathers that are tied on and not glued.
As a matter of fact there are a few on this site that do exactly that and are quite successful at it. Osage Tree is one that immediately comes to mind. I've also done it myself, but have yet to put one in an animal with it.
I don't put anyone else in a box so to speak for what they chose to use, when it all comes down to it we are all "Traditional" in every sense of the word. Where as we still use a bent stick and a string, that projects another stick that's sharp on the end.
Personally I don't use a flipper anymore because I get better arrow flight out of my Bear Grizzly using a chunk of beaver hide glued to my arrow shelf and it's super quiet. But that's just what works for me and what I prefer.
To each his own, and if it means that you make a better hit on an animal because your arrows are flying truer.......then I'm all for it.
I have different opinions about sight pins though, nothing about those are traditional in my opinion, that's kinda where I draw the line (for myself, not others) between traditional and modern equipment.
Oooops......I bet I just opened up a whole new can of worms with that one? :rolleyes: