Well it was a large development effort, but we have modernized our gender categories to use Trans Woman and Trans Man instead of MTF or FTM and also added Non Binary.  There may be some confusion at first as some users chose Male or Female over the label MTF or FTM but all users can edit their profile as they wish.

Some users might also wonder what is cisgender or cis?  Here is the definition if you are not familiar:

https://www.lexico.com/en/definition/cisgender

Denoting or relating to a person whose sense of personal identity and gender corresponds with their birth sex.