How will deepfake voices impact voice authentication and call security?

Over the last year I've been watching advancements in the voice cloning technology being created by companies like [elevenlabs.io](http://elevenlabs.io) and I'm completely blown away with how good its gotten.

How concerned should I be with misuse of this technology? What's the best way to defend from social engineering leveraging this tech?

cybersecurity engineering social social engineering tech technology