Congress will never abolish Mandatory Minimums, but they are offering clemency to thousands of federal inmates "IF THEY QUALIFY". That's a big "IF".
The inmate must have already served ten years, no violence, no member of an organization and no priors. With these requirements I don't expect but a mere 2-3 hundred to qualify.
The Bureau of Prisons is over populated and broke. A small fix. I've always said the feds would never abolish the sentencing policies or the statutes. It grants the DOJ all the power.