If it's a bent instrument with a single string, and no sights it's traditional. Anything beyond that with multiple strings, wheels, cables, screws, sights, ect. is not. That's how I break it down.
Wood, glass, carbon, ect. are just materials to make said bent instrument and I don't push them out of the traditional class because it's still a simple stick/rod and string with no sights just instinct.
I just read a post on another website where a guy shot a nice Corsican Sheep with decent head gear with a glass recurve and apologized for not using his primitive bow. Why? It's still a trad bow with a single string, no sights, no cables and all instinct. So what if it's not a single piece of wood, a wood/cane shaft with a rock point........it's still trad in my book so don't apologize to anyone.
Find what you like and learn it well.
Just my 2 cents.