Depends on its final use. Some say if it is exposed to weather, ie gravel drive/road, weather does deteriorate it. Around us it is used a lot because we dont have much stone here. If we get limestone its been carried from a good distance away via a lake freighter. We do have natural/river gravel mixed with sand as road base. In most cases the crushed concrete gives a better end product. Another use would be crushing and using as a replacement for new aggregates in concrete. I know there are some out there messing around with that portion with good results. It does make sense to me for that use as well. You just need to know your end use, and use the proper product to meet your expectations.