To those people saying that the dev will stop making eroge games, I dont see any posts backing that claim up. Dev simply said his next work(s) is going to be for all ages and he asks that people dont need to sub on his cien as there's no point in it.
Edit: Here's one of his quotes regarding about this subject from his ci-en:
-"You don't make erotic games anymore? I know some of you may be thinking.
I'm just going to go off on a tangent for a moment, but it's not like that. Maybe."-
I dont mind him making non-eroge games. He mentioned that he didnt feel challenged or there's nothing new to really signify freshness on Winter Memories as it's just a sequel with same mechanics.
I think it's a good idea to let him explore other stuff, so when his ready to make a new eroge, we might see new mechanics and improvement in his work.
Not gonna play his next game though, because it's simply a sidescroll turn based rpg from the looks of it. Anyway, I dont think the dev is done making eroge games. But it's gonna be a long long while before we'll get a new eroge from the dev, that's for sure.