I’m not a doctor, but I believe you have every reason to be hopeful. I was diagnosed with T3b cancer in 2001. Two years later it recurred and I was given 35 radiation treatments with no scanning before. PSA dropped and stayed low for 10 years. Cancer recurred again. I started Lupron. PSA dropped again. 5 years later in 2021, recurrence. PSA went to .85 and then .1 in less than 5 months. I underwent a PSMA Gallium 68 scan which showed 4 cancerous pelvic lymph nodes. Underwent 5 SBRT radiation treatments. Latest PSA is undetectable, less than 0.008. It’s a long road but I have felt well most of the time. The only aggravating side effects are ED and incontinence. Not great but I’m alive and enjoying it. Best wishes.