Sorry I'm late to this thread, but between this thread and others on elves and FR gods and itemization and connections to the original BG games I thought it might be useful to note for everyone here that very recently, in an interview, a WotC dude (Crawford?) stated very clearly that it is now WotC policy that EVERYTHING pre-5e is not considered canon anymore. So not only are the old video games and novels and comic books etc no longer considered canon but also even WotC-published sourcebooks from previous editions are no longer considered canon. ONLY 5e sourcebooks and nothing else. It is WotC's latest attempt to make anything pre-5e to be no longer relevant to D&D players, and in this way make people buy the new material if they want canon. And whenever 6e is released, all 5e material will become non-canon and irrelevant too.
With each passing day I come to hate WotC more and more, and can't help asking myself if I want to keep giving WotC even one penny of my money ever again.
I thought the point of that article was not to say that nothing except 5E is canon, but that everything has its own canon and it doesn't make it any less "valid" or whathaveyou. It's basically a pass for Larian to do what they want. It's also a pass for DMs to do what they want.