The departure of Zcash developers is a 'nothing burger' event that will not materially impact the Zcash protocol's development or long-term prospects. The current price drop (20%) is a temporary retail dump.
"But after hours of analysis and speaking to insiders, this Zcash thing is a nothing burger. Nothing has changed except that the devs have moved from one structure where there was a hostile board to another structure. If you were bullish before, nothing has changed."