I think there's a disconnect between player expectations (from video games and previous editions) and the tools 5e actually gives DMs. Every session I run, after every encounter, in every group I run, players always search for treasure. They look for coin, they look for potions, they look for magic armor and weapons. To date, no official published adventure I've used has addressed this. None have used the guidelines in the DMG or Xander's Guide to Whatever. My party of 5th level characters are still so impoverished, they haven't yet gotten a single permanent magic item. (They've received a handful of potions.) The writers at D&D should follow their rules when creating adventures.