How about self-described sissies and crossdressers?

Isn't a crossdresser just an antiquated term for a femboy? Those seem to describe the exact same phenomenon - a person who adopts the clothing and other social aspects of the opposite gender without identifying as that gender.

The term crossdresser has fallen out favor, as it's long held negative connotations. But definitionally, I think a crossdresser and a femboy are the exact same thing.

The trans community has a history of reinventing terms. A lot of the same divisions that exist in the community now existed 20 years ago. The words have just changed. My mapping of new to old terms:

Transsexual -> transsex at best, transmed/truscum at worst

Crossdresser -> femboy

Genderqueer -> various flavors of nonbinary

Transvestite experience -> gender euphoria

Sissy fantasy/scenario -> boy removal fantasy/scenario

A lot of these terms have negative connotations. And we've replaced them with more neutral terms. But people are people; we're still describing the same phenomena. The trans community exists on the euphemism treadmill. We invent terms, those terms gain a negative connotation, so we invent new terms. Those develop a negative connotation. We're always in a never-ending race away from what was the polite and respectable rhetoric of a decade or two in the past.