Just want to point out you keep using this as if it is the "current method" with how Void Elves came to be when that was a very specific one-time moment where a bad guy ethereal was trying to forcefully take away blood elves mortality. It hasn't been confirmed it's "Hey ready for your Void dose of the day? - BRZZZT -! -> Void Elf Bae-bee "
We have no idea on:
1) Are they currently turning more Void Elves
2) If they are, how are they doing it?
None of those have been clarified at all. We don't know how more Void Elves are being made if they are.