No. They are not all at fault. The only one's responsible for updating their phones are the companies supplying the phones. There is nothing stopping Samsung,

No. They are not all at fault. The only one's responsible for updating their phones are the companies supplying the phones. There is nothing stopping Samsung, Sony, HTC, LG from creating and submitting a patch to AOSP and they are the ones who actually have a responsibility to their customers to do so. There is also very little stopping them from updating their phones to 4.4. > is really all Google's fault because they let the carriers get away with it and have never reigned them in even after years of incompetence on the carriers' part. You are again blaming Google for the carriers policy of updating phones not even belonging to Google. Do you really think Google is involved with a carriers agreement to carry Samsung phones? Last time I checked, Nexus phone's can also be updated without the assistance of the carrier.