People still use it all the time, often ironically.

I'll say that, fart jokes aside, I like just saying "posts" for everything because at this point, and in an interconnected set of networks where we're all using multiple services I've frankly outgrown the need to brand each bit of text I spew onto the Internet. It's the same reason I say "I'll text you" instead of "I'll whatsapp you" or whatever.