Wow, that is just 3 times longer than the old Kenmores. Fortunately we are selling the house with the new dishwasher. The house we are keeping has a Kenmore that we purchased 20 years ago. I have had to take it apart a couple of times, but currently the parts are cheap and it is easy to fix. As long as I can get parts and can fix it, I doubt that we will ever get rid of it. After experiencing the new dish washer... my wife agrees.
A common cycle time for new dishwashers is 150 minutes. The Bosch model I mentioned is almost an hour less than that. Our old Kenmore takes about an hour to wash, rinse, and dry (using the heated drying cycle).