I had a friend who changed her name - just to a different female name - when we were all in college, and it took some of us a while to adapt and use her new name. I have some old friends from when I was a kid who don't go by their old nicknames anymore but I still sometimes called them their playground name when we got back in touch... I feel like that is in the same zone. Some people don't really mind, other people can get sensitive about it. If they ask you to please not do that, it's rude to not make the effort. If all the new people they meet easily pick up the new words, you might find yourself going along with it at some point, if you're in contact enough.

Pronouns to me are not that big a deal and I'm fine following protocol, but I also wouldn't care if someone called me by the wrong pronouns... I wish it was considered less of a major issue. I don't like the expectation that you have to provide pronouns at conferences or meetings. I'd be fine with neutral ones if there were common but not plural ones, for instance. The Xir/etc just don't seem to have taken off, but I remember stuff like that being tossed around 30 yrs ago so I don't think of it as a trans thing - more like, a follow up to "Ms", since "he" was so often used as the standard or neutral in examples. Instead, "she" has become a common example, and "he or she" (or "you", or "one" or "they" or just avoiding pronouns) is used to refer to a group since there may actually be women in attendance.

But since trans people have become so militant about it, it has started to rub me the wrong way and sometimes I just kind of avoid pronouns altogether and take how people use pronouns as a sign of their views on the issue. So it's become a little weird. I both don't care and think about it too much.