OP fans have a hard time accepting another manga being this successful. Of course there are some specific circumstances that made it possible (best studio in terms of animation, manga near its end, the total length, so accessibility) but nevertheless, it crushed everything.
Whether it deserves it or not, no idea yet, have not read it, if at all want to watch the anime since it is ufotable, and any adaptation they do is at least visually a feast.
Btw, someone who is knowledgeable in this, why is the total circulation of KnY reported, meaning including digital ones, but not for other series? I have never seen this besides for KnY.