I’ve seen it used as a gender neutral pronoun and some people prefer it to his/her but most people now just use “their” when they don’t know don’t know the gender of the person they are talking about.

With woke pronouns, I feel like an 87 yo man around tiktok - don't care, not going to learn it, not enough time left on Earth to give a crap, happy to glide towards the grave without giving it a second thought. Y'all do you.

I feel like that around anything after icq and msn messenger.

Then why post about it?

again, 87 yo around tiktok - voicing my unbidden opinion is part of the package.

it's an old-style gender neutral pronoun that has mostly fallen out of favor

It's a phrase Greenspun uses a lot on his blog, mocking excessive concern with gender pronouns. (In between a lot of interesting content, he constantly bangs on about 2 topics: how dumb he thinks liberals are, and how US divorce law discriminates against men.)

Somehow it's always family court with these guys.

It's a gender neutral pronoun.

How is it different than using “their”?

It shows you’re woke.

And/or using it ironically, as he does.

Unlike singular their, it's non-standard.

Some people feel like "their" is plural and therefore invented a singular gender-neutral pronoun.

"Their" is grammatically plural, even though what it refers to may be singular, plural, or neither (or, in some cases, may be unknown). "You" is also grammatically plural, even though what it refers to may be singular, plural, or neither. (Singular they seems to be from the 14th century, so it isn't really new.)

It is clear that it is singular.