Follow Up to the Blue Mountains Question - Gundabad

[Kuruharan]

I was reading about the War of the Dwarves and Orcs yesterday when a light went off in my head.

Gundabad was the birthplace of the dwarves and was a special place for them (at least according to what we are told) and the loss of Gundabad to the orcs was a real blow to the dwarves.

So if this is the case, why in the War of the Dwarves and Orcs did the dwarves not re-occupy Gundabad after they took it? The omission on the part of the Longbeards seems particularly curious since they didn't even have a settled home at the time.

Re-occupying old kingdoms seems to have been something of a racial obsession for the dwarves, at least as far as Khazad-dum and Erebor were concerned...but they didn't re-occupy Gundabad even after they had taken it and when they had no settled home.

This strikes me as odd.