I think it's a mistake to consider stealth as a well-defined concept for most people. In my case, coming out as trans in the first place was such a big deal that I assumed I would never go back into any closet of any kind, but real life is messy.
I don't walk around with "TRANS" stamped on my forehead, so people in day-to-day interactions usually don't know unless I tell them. I used to try to make a point of declaring it, but it's a topic that can quickly turn a normal interaction into something fraught or even dangerous. Many people know ahead of time because I deal with a lot of folks who teach or otherwise care for my child, and my transition is a significant detail that is both relevant to her history and also easily inferrable from her records. Those people know, but the default behavior from them seems to be not to bring it up unless I do, so their knowing rarely changes our interactions from what they would be if they did not know. It often feels like stealth when it's not, and vice versa.
I usually keep quiet about it in situations where it isn't useful for people to know, and I'm okay with outright lying about it with people who are very conservative or would gossip too much to others who are very conservative. My gun-loving redneck neighbor has no business knowing about my junk if his knowing would do no good and make both of us uncomfortable. My cat's vet doesn't gain anything by knowing it either, but I might tell him if we spoke very often. I try to tell my pharmacists so they don't give me dirty looks when I try to buy different needles or a sharps bin, but employee turnover at a lot of businesses is high enough that I don't bother in most merchant interactions.
Add to all that the fact that half of the time I try to come out, people either don't seem to even grasp what I'm saying, or they think I'm mtf, and it's all just too much work. Whether I'm stealth or not is a very case-by-case situation.
I do try to be out in situations where my known presence might make it easier for transpeople who come after me.