The only thing I really miss about 4e is the presence of residuum as wealth. Raw magic potential, universal magical ritual component, and all around badass form of wealth.
(We always joked that the wizard snorted it on the side, like cocaine.)
In a 4e campaign my brother ran that I advised on, he had a whole arc dedicated to the monetary system being thrown on its heels by a static magical aura that made alchemically treated stone look and react as gold. This counterfeit gold ruined the local economy during a famine. Imagine Wiemar Germany levels of befuckery. Buying bread with gold, because coppers are worth more than the gold pieces in the local environment.
All the wealth that mattered was in silver, gems, and foodstuffs. There was a fat blind Elven sorcerer with a Lambas press who was making a mint, but was subtly poisoned by the local thieves guild to keep him in check. The jewlers guild was working with the black marketers to forge gold trade bars to take outside of the radius of the aura on the return trips from food smuggling.
Then there were the old residuum-forged Eladrin gold coins that were slightly magic (just a cantrip to resist wear). Said Elven sorcerer's spectacles of read & detect magic had been stolen and were being used to screen these ancient coins out of the currency by the thieves guild at the warehouse where the excess gold coins were being stored.
The antagonist, a mad alchemist, was also baking two-serving bread bombs that made people explode.
Good times.