I just read this entire thread and came to the conclusion it depends on the person and what they are comfortable with. Since I was always issued a DA/SA that is what I purchased for retirement. If I had been issued DAO, I would have probably purchased a DAO for retirement. And I'm too damn old to change.
And what is a safety? My retirement gun is a PX4, and as someone already mentioned, it is easy to change a type F (with safety) to a type G (decocker only). And that would not have been necessary if I could have found a G.