It’s a typical Japanese developer mentality of “if it ain’t broke” (even if it is broke). You see the same thing from other high profile devs like From Soft. I think the country also still relies heavily on fax machines.

Personally I’ve been enjoying the game despite the performance woes but I can see how it would ruin someone else’s fun. You have to wonder about why it is so hard to implement anti-aliasing in their engine…