I think a big problem for repair (apart from the actual damage) is that CRJs don't make money anymore. Write-off values are far more attractive at the moment! But wings can be replaced quite easily, fuselage damage ditto. When the Classic 747s were returned to Boeing to have the upper deck converted with more windows, I was told Boeing simply took a saw to the fuselage and hacked the whole upper deck off. Nothing to metal workers!