Why yet another chat solution?
Why not rather focus on continued development on something we already have?
XMPP, Mattermost, Matrix, Signal and/or Nextcloud Talk - there are clients for all of these, and Matrix and Nextcloud Talk both have quite a momentum in Europe at the moment.
I use the Mattermost, Signal and Sailtrix clients every single day and would love to see these app more actively developed with new functionality rather then jumping on yet another chat solution…