[duskwuff]

Keep in mind that a major use case for Discord is open voice chats (e.g, for gaming groups), not just organized person-to-person calls. Having the quality for a whole chat drop just because someone joined from a mobile phone would be a really disappointing user experience.

[ollien]

This is absolutely something that Discord does, though. I've had friends just drop the bitrate slider as low as possible in Discord just to make the whole channel sound awful

[caffeinewriter]

That's a channel-specific option though. You can set per-channel bitrate, but it's not something Discord does automatically to accommodate lower throughput clients.