I never had any problem with Zoom on i3, but I never tried to share my screen. Zoom on sway works, but since sway runs on top of Wayland and Zoom doesn't have

I never had any problem with Zoom on i3, but I never tried to share my screen. Zoom on sway works, but since sway runs on top of Wayland and Zoom doesn't have the bindings to communicate with Wayland, I'm fairly positive screen sharing would not work. At least, not out of the box ... it might be possible to connect it to some other screen capture process if you're adventurous. PulseAudio runs on top of ALSA. Traditionally, Linux desktop applications connect with ALSA and you can still manage ALSA directly. More recent applications, such as Zoom, expect to connect with Pulse and don't support connecting directly to ALSA. From a user perspective, Pulse offers some advantages like being able to manage audio levels for different applications independently. In early releases, Pulse was unstable and difficult to troubleshoot, so it was easier just to use ALSA directly. Pulse has gotten a lot better in recent versions.