> Largely because the opioid crisis has started to impact a lot of middle class households, which has helped to humanize the problems with drug addiction.

Interesting take! I've always thought it's because of the change in viewpoints towards marijuana (and to a lesser extent, psychedelics).

Attitudes towards recreational marijuana use are far more liberal than they used to be. As it became more socially acceptable it caused much of America to re-examine attitudes towards penalizing drug usage in general, if only because it felt draconian to imprison someone from their milieu for smoking their illegal drug of choice (marijuana).