That’s voice chat, i.e. chat rooms and group conversations.

The “calling” feature is missing though. You can’t get the attention of someone who isn’t currently active on the server.

Wow, all the ideas of the author are bad.

Font size in pixels are a bad idea, because people have different screen resolutions. For some your text might be legible and for some it will be a text for ants. You don’t want that. Also a piece of paper doesn’t have pixels, so you’ll get different results for printed pages. You don’t want that as well.

And the line height thing? No. Just no. Only because I have one larger letter anywhere in my text I don’t want to screw up the line spacing for the whole paragraph/text.

Text size in px is objectively a bad idea.