Traditional Jazz is therefore non traditional, since it came and went within the living memory of one generation.
Louis Armstrong was there in the early days; He was there in the 1960s revival. He was still making records up to his death, when his jazz playing was behind him and Trad Jazz was a tiny cult activity.
As I said before ,"The whole point of Folk and Tradition is that it is what people in their communities once did, or currently do.
It is not defined by committees, or lexicographers, lawyers or even Jim Carroll."
I would dispute that it is inter-generational transmission which creates tradition.
I gave three examples of traditions which have sprung up in very recent times.
Trick or Treat in the UK is another tradition which arose almost instantly and is withering away under the various concerns about paedophilia and anti social behaviour etc.
Lexicographers update definitions according to accepted usage. That is why there are news stories every year about which words have been added to the dictionary, and which have disappeared.
A dictionary is not the infallible word of God Jim.