Additionally, the issues people find with WebkitGTK/Tauri aren't always web related, usually moreso Linux related (weird blank screens, issues with rendering certain stacked items, etc).
I have one such device and Firefox and Chrome also run on it. They're slow but still usable.
Good luck "testing" your video conferencing app on webkitgtk - it doesn't support webrtc! It is still useful to test your error page I suppose.
Note that this is one example among many of missing features, bugs and/or horrible performance.
Here's a preview: no notifications, no :has, no TLA.
(Not blaming the epiphany devs for the situation here to be clear)
It proves what everyone knows: that there's no reason WebRTC can't work in Tauri/Linux environments.
It also proves the point here: there are legitimate issues with the system-provided webview approach that are not always apparent.