Oh, I've got a long list of things that have gone out of style, most of which I still use. I'm very un-chic, you know. There are so many, I don't know where to begin. I have to point out that this list is decidedly American-oriented and not necessarily Bushcraft in particular, just outdoors stuff.
Canvas canoe packs (the Duluth Pack), but also
The Bergan "Meis" framed rucksack.
External framed packs generally.
The Svea 123 gasoline stove.
Packboards and the Trapper Nelson in particular.
Fresh made biscuits for breakfast (American style biscuits, that is, something like an English muffin)
Any fresh made bread in camp.
Heavy hiking boots with red bootlaces.
Tyrolean hats.
Corduroy shorts.
Everything wool in any season.
Stetson hats.
"Waist overalls." Bet you have to look that up.
Sterno/canned heat.
Down-filled clothing.
Breeches; "foot," not riding.
Canvas wall tents.
Any wall tent.
Indian lore.
Teepees.
Pipe smoking.
Permanent camps.
Carbide lamps.
Moccasins.
Stag jackets.
Tomahawks.
Anything tinned or galvanized.
Anything enameled.
Anything your mother made for you or loaned to you.
Erbswurst.
Bacon.
Large, round, blanket-covered Western-style canteens.
Kitchen matches.
Animal transport.
I'm sure there's more. But I'm delighted someone mentioned Radio Luxembourg. I think there was also Radio Caroline. I was able to listen to them when I was in Germany for a few years in the 1960s.