Ahhh…you have reached that point in your life where you realise that adding life to your years is more important than adding years to your life.
You’ve got all the rugrats you can handle, so fertility is not a concern…you appreciate how awesome you feel on testosterone and you (understandably) wish to ride that wave forever - as I do. I support your desire to blast and cruise forever!
Major concerns IMO are blood viscosity and stroke. AAS = increased RBCs = inc. risk of stroke.
Solution: give blood regularly and consume plenty of omega 3 (lubricates the blood).
Prostate is another issue obv. but not something I am experienced in as I’ve never had issues there (i’m only in my early 40s).
I stay away from orals mostly, due to liver health and I keep an eye on my blood pressure etc.
The most prevalent issue for me is my mood when on high doses of androgens (e.g masteron) which can make me emotionally dead. My wife doesn’t like me that way (shock!) and since she is such an awesome woman, I let her impose a ban on tren and a limit on masteron.
Remember to walk a middle path (no excessive doses or excessive muscle mass) and stay observant of self and you should be OK.