Hi Robert, sorry to hear about the diagnosis. At 70 you were more likely to have cancer than not have it, but for it to be advanced is unfortunate.
With hormone treatment and enzulutamide you have every chance of living a number of years possibly over a decade.
I don't know if we have any contributors on clinical trials at the moment. Quite often trials are looking at small differences in treatment options, for example with RT halving the number of treatments but using twice the dose. After a few years they find whether people lived longer or shorter as a result.
A trial will always try and give you at least as good a treatment as what is currently available, but you do need to accept you may live less or have worse side effects as a result of the trial.
I am all for trials we wouldn't be where we are today without them. If you find yourself in the last chance saloon (you aren't there yet) then any trial is a good idea. If you aren't in the last chance saloon, then view a trial as more likely to benefit future generations than yourself, if your feeling lucky go for it.