Or the management all read the same article in PC Magazine and lo! the next day did orders come down to implement said article, regardless. Waterworld, rowing the Valdez. Some years of this usually results in some number of half-baked or half-implemented systems scattered about production, and who knows which if any are actually used, or how much stink there will be to shutdown something unpatchable. Like why are there two wiki engines, sharepoint, three different database servers, …