By that statement I mean, what happens to tgirls that completely disappear from everywhere you would expect to find a tgirl? It's obvious that many tgirls really become much more feminine in their appearance over time, does this influence some of them to fully integrate into society as women?

For instance a tgirl might have been really popular in certain circles in 2001, but hasn't been seen anywhere remotely close to those circles in many many years.