I've had a good experience with Discord. At work we use it as our primary voice communication software, and it hardly ever has issues with audio quality. Screen

I've had a good experience with Discord. At work we use it as our primary voice communication software, and it hardly ever has issues with audio quality. Screen sharing is also configurable, which is good as you can better decide where your bitrate goes. Sure, it's still Electron, but as far as Electron apps go, it's pretty responsive. Uses about 500MB RAM even on my personal account with literally hundreds of joined communities, some of them with thousands to tens of thousands of members. It also doesn't drop notifications and the read indicators are not insane. I still prefer Slack's text chat for business use, mainly because threads are frictionless to create, while on Discord they are more like "temporary sub-channels" where you still need to give them titles. But it's otherwise pretty good, and it has GFM-style highlighted code formatting.