I understand squib rounds having a few of them myself. The point is to check any gun when you only hear a faint pop. Luckily you had squib that didn't destroy the gun, but there's also the possibility of an over charged round that will cause a kaboom. If I had a kaboom in a Rhino, I would certainly wish I had it in a S&W or Ruger instead. At least the blast goes up and out the sides instead of downward into my hand. For every one Rhino sold I'm willing to bet thousands if not tens of thousand (more maybe?) of regular revolvers have been sold. That's why you're not going to hear of many kabooms in a Rhino, but just Google image "revolver kaboom" and you'll see a large amount of regular revolver pictures that had the blast go up and/or out the sides or tear off the barrel. Even the plastic and aluminum framed regular revolvers stay relatively intact most of the time. Barrel at the top, kaboom goes up and/or out the sides. Barrel at the bottom, kaboom goes down and/or out the sides. It's the nature of the design.
Also, most people that own firearms also don't run online and post about their problems or belong to gun forums, so add that to the tiny amount of Rhino owners out there and you won't see or hear much about these guns. I've owned hundreds of guns and I've had my fair share of problems that I never posted about on a gun forum even though I belong to quite a few.
All in all, enjoy the Rhino. I truly enjoyed my 50DS. I just chose to stick with the traditional design for reasons I deem important.