I’m not sure why you keep thinking I only like Classic Sonic. I just don’t understand why they can’t have both separately. I agree with you that they shouldn’t both be in the same game. And I want a good Modern Sonic game. I’ve said that numerous times.Except Sonic tubers actually praised Mania; they just don't want it to be the future of the franchise. And no, Classic can die. That's an era of Sonic long past; if you still want 2D gameplay, it'll be Modern Sonic. There are tons of 2D sonic fangames on the level of the originals, and even 2D sonic ripoffs like Freedom Planet for you to enjoy.
It can’t just be about wanting to go off and play 2D fan games. There are plenty of fan games with Modern Sonic as well, so that argument holds no water. So I could just tell purely Modern Sonic fans the same thing. But I wouldn’t. Because I understand the desire for official game approaches. Which is what I was hoping for with both Sonic generations. And why I hope most of this rumour is false.