Future with spinal degeneration post fusion

Hi. I’m 49 years old and quite athletic. 30 years ago I had a spinal fusion from T3-L2. I experience occasional back pain but it’s mostly minor. If I’ve been very active for long periods of time, my back gets stiff and I have difficulty fully standing up for a little bit.

I just received an MRI showing severe facet arthritis, a few disc protrusions, bone marrow edema at the rod ending, and a couple spots of nerve abutment between L3 and S1. Some segments are better than others. There is also some vertebrae slip (less than 5 mm) between L4 and L5.

Radiologically, I look a mess, but I have strong core muscles and don’t feel much pain… yet. Am I just bound for surgical intervention no matter what?

I wish the surgeon who did my fusion better explained the risks of degeneration at the time. I did it for scoliosis and I mag not have corrected it had I known. I am scared about the future especially the idea of potentially being in chronic pain or immobilized in some way.