IRCv3 is being incrementally adopted, even if it is a bit slow. I think in the case of the /history command, Libera had some concerns about implementation and what channels would prefer not to have a history. ... and actually, checking the spec matrix, chathistory is still a draft.

But Libera does have some other IRCv3 features enabled.

https://ircv3.net/support/networks

There's also a #ircv3 on Libera with implementation discussion

I see, good to see that it's getting implemented slowly at least.

> /chathistory is still a draft

Did not know that, only reason I asked was that some other server already implemented it (think it was the last 100 posts but it's been a while since then).