IMO changing the URL to point to something completely different is bad because it makes the discussion confusing. Example: the recent discussion of a very long

IMO changing the URL to point to something completely different is bad because it makes the discussion confusing. Example: the recent discussion of a very long Cocoa identifier for a Chinese kinship term (I don’t remember the exact one) was changed to a slightly different one that was two characters longer. Making a bunch of the existing discussion confusing was not worth the value of changing the URL, in that case.