Wow
A person asks about a custom vanilla rom, and look at some of the answers. So glad to live in 2019 when XDA posts are turned into youtube comments on taylor swift videos.
People are not "dumb or stupid" if they're looking for customization options on XDA. They're maybe "wrong" in some cases. Just tell them why.
To answer your question:
These days there are too many flagships and midrange phones out there. Also The oems use different hardwares and barely release their source codes and drivers. Plus, stock roms are way more feature rich and fluid than before. For all these reasons the development of vanilla based roms is limited and less reasonable for most phones. Except pixel phones and Android one phones. Even there, all different roms are lineage-based and basically the same, with same features and same bugs! But different visuall traits!
There is a Lineage os for note 8.0 but in very early stages. About other custom roms (stock based), they do a great job in terms of features and removing so called bloatwares, but personally I recommend you staying on stock because unlike few years ago, stock roms get you better performance, features, battery life, etc. I'm currently using pixel 2 and note 8 and trust me, you get bored by plain android!