I wonder if that has more to do with the nature of work in recent years than actual preferences. I would love to take longer trips but usually can only ever fit in 2-3 day trips because of work.
For me, I figure 2-3 day trips made over a weekend cost me only 1 vacation day, so annually I get 2-3x as many days on trips for the same number of vacation days.
Of course, then you exclusively contend with weekend crowds. I dream one day the work week is culturally decoupled from M-F, and people's "weekend" is any two days of the week. It would mean less crowds for everyone and more regular business for tourist towns. K-12 school schedule is probably the chief impediment.
The issue there is the same with any flexible work option and that's coordination. If people are actually taking advantage of it it becomes increasingly harder to have meetings with multiple people involved.
