That chain is perfectly salvageable if you had the patience. Being 1/4 chain, there's not that much material to deal with. A grinder would obviously help, but those cutters could be brought back to life quite easily with a file just as well. The majority of the effort would be getting the rakers right..., with a progressive depth gauge tool. If done correctly, the broken cutter won't matter (make it go away), nor will different cutter lengths. I'd revive it if it were mine and probably get two or three more sharpenings out of it before the end of its useful life.