I still prefer to use Mumble over Discord for its low latency, low system requirements, simplicity, free software license, and voice activity options / wizard.

I still prefer to use Mumble over Discord for its low latency, low system requirements, simplicity, free software license, and voice activity options / wizard. I created a Discord server to fill the void of a Slack-like chat for our group, but even after we had created the Discord, we still preferred Mumble for VoIP. We ended up replacing the Discord chat with Riot.im eventually anyway.