> Perhaps now that prescription is reigned in, we are seeing a lot fewer oxy->fent cases which has cut back on the deaths.

This is definitely part of the story. When your primary source of new addicts is prescription opioids and you cut down on the prescriptions then over time, as people die off from OD, then the OD rate is bound to drop.

The most tragic part of it, to me, is that it's usually the people who got clean who eventually OD. Once they've been clean for a short time then their tolerance for the drug drops drastically, then if they break down and do "just one dose" they make the fatal mistake of thinking they can still handle the same amount they were used to doing before. This exact scenario happened to multiple more or less close acquaintances of mine, even people who were aware of tolerance and should have known better. I'm fairly sure that it's extremely common.

This theory predicts a significant decrease in addiction rates. Is there any evidence of that?