Very cool idea - congrats on the launch! I think as business communications become more informal in general and efficiency is prioritized this could really catch on. I'm guessing you're already thinking about this, but I find voice notes overall are much more prevalent in certain communities, so it could be interesting to explore those (places where Whatsapp is used much more, Spanish speaking countries, etc.) I imagine when people are already heavily using voice notes in their personal lives it's easier to also start using them in business communications.
