This is what Purism is telling us about L5 and VoIP:
“Matrix is an open ecosystem for interoperable encrypted communication, supporting a rapidly growing community of over 2 million users for VoIP and Slack-style messaging. Allowing you to easily communicate securely to any Internet connected device, including iOS, Android, Windows, OSX, or GNU+Linux machines. Having a native communication suite which allows for Calling, Text Messaging, Group Messaging, and Video Calling is the future of communication.”
So… what could make someone bet on the opposite??