Well i was diagnosed with MPC in Nov 2019, spread to liver, several pelvic bones, rectum, bladder. I have had HT Zoladex from the get-go, an early course of CT Docetaxel, and after a year a round of RT. By PSA is down to 0.15 or so, but it was never that elevated anyway (max 29) despite a Gleason of 9.
CT seemed to shrivel the mets on the liver. HT has slowed the rest down. RT reduced activity in the primary tumour.
All i would say is that i have so far been very lucky. Unlike others' experiences here, none of the above treatments have been at all bad or left me with too-nasty side effects. (The HT gives me the most, including loss of sex drive and weight gain, hot flushes). What i mean is, i feel lucky so far, i feel fit. I get the occasional twinge of pain but really nothing to bother me. I walk 6 miles a day and swim most days.
All the symptoms (severe pain, constant weeing, pain in hips) i had pre-diagnosis have gone, at the moment--helped also by a TURP plus Solifenacin which means my bladder control is just dandy.
So, it might all be fine for a little while at least. . Try to be optimistic--sometimes the side effects are not too bad and the therapies help.