As SE is a Q&A network with different websites for different fields of expertise, is it possible that some of the more 'obscure' websites that cover a narrow field slowly die out? There is only a limited amount of questions to be asked and with the "mark-as-duplicate" feature growing and with the fact that duplicates don't have to be exactly the same, it is possible that some sites could 'die out'?
As tchrist states on EL&U:
... By now pretty much ALL frequently asked English questions like this one have been answered already, including this one. I’d familiarize myself with those top ones in the first page there.