Went out and bought the Stealth. I decided that I cannot risk being in the middle of a trip and having the suitcase fall apart.
My luggage store said they received a letter from Rimowa recently stating that they will no longer replace the bags. They have developed a system for repairing the polycarbonate. That may be so, but it doesn't solve the basic problem.
BTW, I get all my luggage from Lexington Luggage in New York City. I have been dealing with them for 30 years. Excellent service and prices.