As of 19 April 2021, my left bionic hip has been in continuous service for 4,044 days (12.07 years); my right bionic hip has been in continuous service for 3,085 days (8.45 years).  During recent trips to the orthopedist and a few x-rays later, I got the good news that they are aging gracefully.  Unfortunately, my arthritic knees are not!