Sweetstars, I think you and I are talking about the same thing, i.e., that gradually you get to the point where more people do not know about your past than do know. I'm not sure I would call that stealth, though.
Deep stealth used to be almost a requirement for survival in the bad old days but now usually isn't necessary. I am open and honest with my friends who knew me before transition, but I don't go around telling everyone. If someone treats me as the woman I am, I just accept that and don't bother pointing out that I used to present male.
What I don't understand is why my understanding - as an older person and a late transitioner - is any different from what you are saying.

To me, "stealth" is actively hiding your background. It can be done, especially if you are younger and have less background to hide. But at some point it
may come out, regardless.
I think what we are both talking about, Sweetstars, is an almost "organic stealth" that grows out of just living your new life. A younger transitioner is more likely to achieve that simply because they have more of their life to live as their new self.
N'cest pas?
- Kate