englanddg
One Little Spark...
It's the whole "memories" push that started in the 90s or so, I think. Here, watch this...1982You are right that the marketing has definitely swung further and further towards a younger demographic. If you ever watch some of the old WDW resort "propaganda" videos from the 80s they focus just as much on the resorts and activities outside the parks as the parks themselves. They talk about boating, hiking, tennis and shopping. Not that those things would exclude kids but they are not marketed specifically to kids. Today's marketing for WDW tends to lean more heavily towards younger kids and the characters in the parks.
Then watch this...1994
Then this...2010
I agree, it became less about marketing what has always been seen as a "kids" venue to adults, and more about marketing memories. And, they've stuck with that.