Please note that the following will happen once we upgrade to 1.16 (date yet unknown):
- The nether will be reset (i.e. completely wiped and re-generated). This won’t affect anything except for items you have stored there.
- The aether will be deleted (i.e. completely wiped and NOT re-generated). This won’t affect anything except for items you have stored there.
Until we find a new world generator (or Mojang makes one) that works fine as a replacement for the aether, we will have to do without one.
Update: FYI, Mojang is releasing daily new pre-releases now:
There is supposed to be a final release before the 26th. We will have to see if the spigot release will take a long time, but I would think this will be quick since they were able to work with the snapshots already.