What exactly are you afraid of and how many miles would you want to run per week if you did get back to running?
I have been running on a right hip replacement for 18 months with a typical week of 20/30 miles and a high of 45 while trying for a half marathon this past spring and have no issues with the right hip. I am starting to have issues with my left hip so made an appointment to have it looked at in August. I am so happy with the progress with my right, I wouldn’t hesitate to have my left hip replaced if the Dr said it was time.
For background I am a long time endurance athlete, 66 year old that also does triathlons.