I respectfully disagree
however, devs can have some deterministic way to grind, some examples:
Behind pinnable bosses
Behind goblins (with a lower spawn rate)
Behind a craft system, with maths dropped in those underplayed mechanics
As possible rewrds from higher nightmare dungeons (random uniques are already shown, but they can change it to have a progression among higher levels)
The entire community can share ideas about what way can be better, but any ideia is better than give more brute %magic find, behind highter world tiers (cause this was the powercreep meta that ruined D3)