Does that mean it's finally becoming a native app? By far the worst part of MS Teams is that it's slow and can't really help when it can't connect to its servers because it's just a web page.
WebView2 is shipped/serviced by Windows (auto-updates with Edgmium at roughly the exact same pace as Chromium/Chrome), and it's a shared control with a single install which Windows can optimize memory usage/performance. As opposed to Electron packages its own Chromium, updates have to be shipped inside the application at the application's pace (including and especially security updates), and the install size and memory usage/performance is bloated for every Electron app bundling lots of the exact same Chromium DLLs and whatnot.