An interruptor cam is certainly still used on shipboard guns such as goalkeeper. I always assumed that the technology went back to WW2 - being pretty obvious and robust.
On ships there have been a few "incidents" over the years where something (say a new radome) was added to the ship but nobody changed the shape of the interruptor cams. I am aware of this happening on an RN Frigate in the early 90s during some modified goalkeeper trials where nobody allowed in the cam design for the shape of a large camera cluster bolted onto the side of the bridge to film the trial. The bridge was, technically, left unharmed -if a lot of high speed bits of disintegrating camera cluster is a technicality that you can overlook.
G