Radiation therapy might cure cancer (especially if it's spread to only a few places, aka "oligometastatic"), but doctors can't promise anything because there's no medical way to detect if there are still dormant cancer cells or micrometastases lurking around. That's why they talk only about "remission" rather than "cure" when we're at stage 4. But with the help of radiation, ADT, an ARSI (like the -lutamides), and maybe other treatments later if there's any progression, your so-called "remission" could potentially last until you die of old age or something else unrelated to cancer, which would make it hard to distinguish from a "cure". 🙂

I'm over 3 1/2 years in functional remission, and hoping for decades to come. I'm also likely going to be on ADT and ARSI for life, or at least until there are new medical breakthroughs. The ADT side-effects have been manageable for me, but they have brought about life changes.