Usually when people talk about the rise and fall of Slashdot they are not referring to anything that happened on that domain in 2011 or later. Slashdot was great while it broadened in scope, but the wide scope made it vulnerable to both even more open competition (e.g. reddit, where absolutely every niche can have its niche) end more specific specializations (e.g. kuro5hin, for a few years), leaving the site with a broadness it could not really fill anymore.