And instead of improving their code so Teams is fast as VS Code, they delegated it to the Edge team to write a new version of Electron called WebView2.

Teams' codebase is apparently so bad that it's not fixable and they need to rely on others to rewrite the runtime for them.

For good measure it also subscribes to the media keys on the keyboard. To mute your microphone you might think, but no, to play the dial tone twice when pressing play/pause for your music! Very useful, thank you Microsoft.