Ask any e-discovery practitioner, technologist, or service provider what has been the leading source of digital evidence over the past 20 years or so and they'll probably say something along the lines of "corporate email." And while likely accurate, what was true in the aughts and teens with respect to how we communicate at work is not necessarily true today. As text and app messaging and online communication platforms such as Slack continue to supplement—and supplant—email communications in the workplace, parties and courts need to consider these technologies' impact on document preservation and production obligations.