Yes, it's a difficult and personal choice. IMO, the main reason people sometimes become castrate resistant when they're on ADT and ARSI long term is that the castrate-sensitive cancer was prevented from spreading much earlier (which would have been worse; you don't want any cancer forming new metastases). 😕

After 2-1/2 years the Drs probably wanted to see if they've successfully stopped any growth. They'd rather you not go through the side effects, of ADT, any longer than necessary. Testosterone levels can be another signal. Three years after stopping ADT, my T level was 425. Urologist said that tells him that the fairly high T level was not feeding anything, since my PSA was still < .001. An ongoing guessing game, perhaps? I hope you go years and years without any recurrence.