People have been claiming a certain genre or type of game is dead throughout the history of video games, and it has practically never been true. From adventure games to space-combat simulators to 2D platformers and who knows how many others, and it's almost never true. Every genre has its peaks and valleys in terms of popularity and relevance, but just because something isn't always on the top of sales charts doesn't mean it's instantly dead as a genre. Calling it that is most of the time just sensationalism that disregards most evidence to the contrary.
The two articles cited there seemed to largely be just from the perspectives of individual people who have only a limited grasp of turn-based RPGs as a genre. Games like Banner Saga, Legend of Heros: Trails in the Sky, Ni No Kuni, Child of Light, and many others show very clearly that the genre is doing quite well for itself. They may not be selling millions of copies at launch, but that doesn't meant they are somehow instantly unsuccessful.
I could probably write an entire article debunking this idea that a video game genre is dead because it's not quite as popular as before.