Using a process based definition, pretty much everything but classical music is traditional. Using a music based definition, there is a body of music that exists as a discreet genre that is usually called "traditional folk music" or just "traditional music".

We all know that everything has to be included in a process based definition of "traditional". So what? Who's arguing about that? Since this is a folk music forum, and since the term "traditional music" is widely used by folk musicians to denote a specific genre, why bother starting this kind of thread here?

I don't give a rat's ass about whatever some bunch of academics came up for definitions. Academic musicology is pretty far around the circle from traditional music making; it is not at all pertinent to how we generally refer to different genres of music, and doesn't have any bearing at all on what we like to listen to and play.

If you want to redefine the phrase "traditional music", please go do it somewhere else. Find a different phrase to denote music that came from the people. Stop trying to steal the name of the genre of music that a lot of us play.