but the "what would you do, if you knew" question feels quite real here.
Get an advanced-health-directive is probably where I would go btw, if I got the test, irrespective of a -/+ outcome.
My grandfather died around 70 or so from Alzheimer's, and my friend's dad died a bit earlier. (50s). Both would have done things differently to prepare their family emotionally and financially.
It would certainly be scary to know, but having that information is more useful than not.