I believe that only happened because Illinois was the only state left to allow concealed carry by that time, the writing on the wall was not only clear but being blasted out of loud speakers across the country in every court. Daddy Madigan as much as we hate him isn't/wasn't a dumb man, he knew the gig was up did what was necessary to save his families face.
That didn't stop Durbin from going on TV and saying, "Just because 49 other states have it, doesn't make IL wrong." The entrenched mindset of these 4,000 term politicians always on display. Assault weapons ban or bust relection or bust is more like it.