Both my grandfather and my father have gone through it, and I suspect I’ll be up to bat at some point. My grandfather was diagnosed in his late 60s and the doctors suggested he’d had it since his 40s. He didn’t have it removed. He’s 78 now, still has his prostate and it functions just fine. No markers for worsening.
My father was diagnosed with early-stage at 54. He’s taking the same route as his father. They go for bi-annual checkups and as of now, neither one of them has any issues.
If you have the slow grow, you probably are ok. My dad died from the fast grow version, and it was a very long painful exit, so I opted for surgery.