Not really. There was admittance that species have different average aggression levels, and I’d say that’s pretty valuable information. Were it not for such threads I might have mixed my convicts with my Parachromis. I just thought it strange to call information useless.
I don't see how a thread like this teaches us anything about compatability.
Parachromis and Convicts could be quite compatible in a large enough tank.
If I had a suitably furnished 500 gallon I could raise Convicts and a Parachromis without to much aggro.
The list of variables to what makes a certain fish act aggressive is vast.
A pair of angelfish could be extremely aggressive towards its own kind in a small tank but they won't make this threads list.
It's mostly about scale.
I would bet that over half the fish on this thread have not been kept to scale. What I mean by that is most of the big glass banging cichlids size requirements have not been met. If they had they would not have shown such aggressive behaviour.
All this thread teaches us is what a certain person experienced with fish that were more often than not kept with other cichlids that required more room.