I don't feel like we are losing "they" as a plural. We're just learning how to use it in more singular contexts than we used it before. Many new pronouns have been invented and some folks use them, but none of them really catch on. "They" has the advantage of being universally recognized in a lot of contexts already, plus, it's what people who's identities for themselves prefer, which is in my opinion the most important aspect. I think 99/100 times, the use of the "they" pronoun can be understood in context once one is familiar with its use. I think we just need to accept this as part of language and accept it's here.
To be clear, I do accept it - the common decency of referring to people the way they would like to be referred to is much more important than a minor linguistic inconvenience to me. I'd just have preferred one of those others had caught on.
