Why is this "modern"?

The extensive IRCv3 support for one thing. chathistory support in particular is a big one for me since we rely on it on my personal server.

If you scroll down to the Features section on the linked page that gives a good overview.

Hi, I'm used to save locally chat history of channels I'm listening to.

In hexchat GUI client chat history is locally found in a simple text file, one line per message in .config/hexchat/logs/irc.libera.chat/xxx.log

However I've found no option to create such a log with halloy, am I missing something in the documentation?