Honestly the person running the seminars was very very strict. Several people said "I don't really care what people call me by", or can I just leave it blank to be what people want. The person explained how that attitude is disrespectful to people who do care about these things, and how it can foster an environment of hostility towards people who put them. Which in turn marginalizes those people etc.
However in January the entire sales team removed them after apparently a customer reacted negatively to the inclusion. Which lead to other external facing teams removing it to prevent the same issue. Most people have removed it from emails, and honestly many people just don't seem to care, and HR doesn't seem to be enforcing it.