I wouldn't be so quick to criticize Cummins; At least they made customers aware of a potential issue. We have the other brand in our boat and had to limp home when both engines broke studs holding the turbos. The resulting mess wasn't pretty - air filters clogged, engines sucked the filters down, soot bypassed the squished filters, and every square inch of the engines, transmissions and engine room was covered in black, oily soot. Had to dismantle the salon to raise the decks so the techs could remove the blocked aftercoolers and replace the broken turbo studs.
There had been a "service bulletin" issued to dealers with a specific instruction "do not replace until failure occurs". I read it when a tech inadvertently left it on the boat. The engine manufacturer paid for almost all the cleanup, salon teardown, and repair work, for which I was grateful. Fortunately, we were relatively close to shore, nearing the end of a journey up the CA coast. But, had we been 20 miles offshore in bad weather, that could have been a lot more serious than it was. Had I been notified of a potential problem, I would have had the simple replacement of studs done before we left home.