And they are now some (if not the) largest communities on those subjects on the Threadiverse (and the top communities on their instance), so I consider that point demonstrated.

It's like the original idea behind the Net - if a node goes down, everything shifts to accommodate. If the power posters switch to a specific community people will just use that more.

Reasons for starting a new community:

• Avoid centralisation
• Avoid tankie instances
• If you don't agree with the current Mods or Admins

We've done all that and it has worked.