They keep releasing more and more generic isekai because it's the simplest thing there is, it's what's most consumed in the East.
Unfortunately that is what's more appealing to the majority of viewers nowadays. I think they don't wanna adapt those with plots that don't conform with the norms because that would be a huge gamble. Gangsta, for example, has an interesting premise, but unfortunately its production led the studio to its bankruptcy. Not that it's a flop, but it wasn't a hit either. Its concept doesn't follow the generic anime plot out there, or perhaps it's too ahead of its time. Either way, most of the studios wanted something that's simple and understandable to most of the viewers, so they tend to adapt those anime whose plot is easy to market. Just like with what they depicted on how A Tale of Perishing became a flop...it didn't become a hit because people don't understand it.
But the fact that there are good isekai anime is undeniable.
That—even though I'm not a huge fan of this genre—I believe. I already heard of Re:Zero before, maybe during my early high school days. I remembered how my classmate printed this blue-haired girl's pictures. Apparently, a lot of my boy classmates liked her, and they're gushing about how the MC should have picked her instead of the white haired girl (if my memory serves right...?). I wasn't paying much attention to it because I was in my Fairy Tail fanatic era at that time lol. Anyway, the way you described it seemed intriguing, plus there's psychological suspense and horror hmmm...that's really unusual. I might try watching it one of these days, probably if I finish my January to-watch list. Thanks for hooking me up with this; I'll see if it will suit my preference :)
RE: Zenshu: The First Isekai I Love