My husband had docetaxel chemotherapy almost nine years ago. It knocked the cancer down and no new metastases appeared for several years. Since the chemo, my husband has had many other treatments for metastatic prostate cancer: Zytiga, Lupron shots, lots of spot radiation to spinal metastases, ablation of one cancer spot on his spine, and Pluvicto. He was first diagnosed in 2005, and is still here 20 years later, at age 78, with no major ill effects from either the cancer or the treatments. So take heart--men can live for many years with Stage 4 prostate cancer, and live pretty well too.