Without threads, there is no breach of thread-etiquette.
When "channels" are so awkward, nobody uses them. Then there is no constant deluge of middle-age folks creating a Facebook out of work, needing to be reminded that the photos channel is for business-photos, not pictures of their kids.
When emoji support is limited, nobody has to police people pushing the boundaries of what emojis are appropriate.
The software is baffling. But I like it that way.