In the end, I think different BB forums will need different markdown supports. Coders will even need highlighted code blocks. A Scientific forum will need support for latex equations and maybe even full latex instead of Markdown.

So, even the kind I proposed will be broken down into other kinds later, when the need arises.

Similarly, I am sure there will be an AsciiDoc kind for BB systems as well as a BBCode kind in time.

Those are all going to be sub kinds into the same NIP for different BB systems that should not really see each other's data.

> On the existing products..

I like to talk about existing products exactly because it highlights how different things can be. And they already have product/market fit. So, it's less assumption, more reallife data. But of course, I support new products as well. They just need to prove they are what people want before spending too much time in it.