Bigel, I was about your age when I went through THE TREATMENT and I'm now 78, so we have/had a similar pathway. I feared I'd been a bit heavy handed with my suggestions but I only found out after the event that the side effects can be important. Actually, I think I avoided thinking about them during treatment because it was quite enough dealing with HT!
I suffered slight ostopaenia, a rise in cholesterol and slightly higher blood pressure. I'm now on a low dose of statins and I take calcium pills. The good news is, that having got to the point where my testosterone has returned I've had improvements in bone density, lower cholesterol and my blood pressure has fallen. The pills made a contribution but so did the return of testosterone.
Your oncologist might actually be quietly pleased for the period of time that testosterone stays away because it's an extension of the HT treatment in effect. If, after a year and a half, your psa is still fine but testosterone hasn't returned [which is frequently the case] it could be worth asking for hormone replacement therapy. There's pros and cons for it but the side effects of lack of testosterone are significant too, so it's a question of where you want the balance to be.
Jules