I'm going to be a bit controversial here and go against the KF grain on this issue, so sue me.
I believe that people have a right to express themselves in whatever way they so wish. If you want to say you are man or woman now, go for it, and I'll respect your stated pronouns as much as your name. Make it clear, and don't be wishy-washy.
However, there is a clear difference between a cisgendered woman versus a transgender woman, and visa versa for transmen and cisgendered men. A lot of transgender activists want to eliminate this difference in nomenclature by saying that "all women are women..." That's not right. Cisgendered women are women, but transgender women are a different kind of women.
Anyways that's the controversial piece I can't quite share with the rest of the world but I can only share here.