What products have they released recently targetting the old audience, do you think? I don't own Dungeon of the Mad Archmage, but that sounded like a pretty trad D&D concept, at least if it had had any treasure in the dungeon.
Bolded for emphasis.
The whole beginning stage was for old audiences. The PHB, DMG, MM, and everything that was released in the first 2 years of 5e was for old audience.
5th edition literally doesn't have a release of a new setting nor class created by WOTC yet and is just barely adding newraces and subclasses.
That's why a lot of the stuff is shifting. Because almost everything in the beginning was not designed for the new audience D&D 5e accidentally got.
The burger joint that adds a chicken sandwich is still a burger joint.