Just want to, as originator of this discussion, thank everybody who has responded so far!
Lots of very thoughtful, honest, revealing, and often vulnerable comments, and I'm so happy for those who have had positive results--for either approach--as well as truly sorry for those who have regrets for the path chosen.
Thus far it seems pretty 50-50 with RP or RT, and I think I have decided to go with the RALP, given that:
1. I feel still young and vigorous enough (What?! You're in your eighth decade of life!! Obviously in denial...) to do okay with fairly major surgery (it's only "golf ball sized", right?)
2. Although radiation is apparently equally effective and has improved, I would also apparently need hormonal therapy, and that has some big potential downsides. For example, fatigue for me is already an issue due to Long Covid.
3. I like the idea of it being (potentially, I know) "one and done". That is, I'll be immediately confronted with some of the unwanted effects that will HOPEFULLY subside, as opposed to a delayed reaction of side effects from radiation that typically take months or even YEARS to manifest. Also it offers immediate analysis of the actual current cancer state.
4. If one process is chosen but proves ultimately unsuccessful, or only partially successful, it's much "easier" to get RT after RP than the converse.

I still have a CAT scan upcoming, which might potentially put things in a different light, although the radiation oncologist, interestingly, thought that unlikely. Fortunately, I happen to live in a city with a large university that has an NCI approved cancer treatment center, so I'm in good hands with both treatment approaches, and both doctors described quite good results with their many years of respective experiences. In addition to the radiation oncologist and the urological surgeon, I've consulted with a very senior urological oncologist.
Meanwhile, I am trying to be religious in my observation of the Ritual of the Holy Kegels, with the help, thus far, of a charming Australian lass on YTube.

So again, thank all of you so very much, my Prostate Pals-in-arms, and let's keep this discussion going since I'll certainly be paying attention, plus it might benefit others wrestling with The Decision!