There’s a bit of steck in the Ayuma 70807 Bat fairies ruïne. Do they often use steck in new releases?
Very rarely for normal catalogue stuff and pretty much never for an actual building.
Several sets had this small fort in it:

The battlement/low wall pieces are steck.
The dormer window in the Super 4 pirate hideout set is steck.

Some of the rectangular windows from various lines are steck. 5422 uses a steck window for the door going out to the balcony.