X now considers the term “cisgender” a slur. On Tuesday, the platform reportedly began posting an official warning that the LGBTQ-inclusive terms could result in a ban from the platform.
It is, and it's a word we need there's not a different term for it and it's a useful concept. Close minded people just hate that it implies the existence of trans people.
Much like all words for a privileged group it has some people who really don’t like it. Transphobes in particular dislike it because it is neutral and contains no value judgement. But also because it gives people the language to talk about trans experiences without misgendering or othering trans people