@vjousse As a Vim user, I find it quite annoying that when I search for something Vim related, I find Neovim plugins or posts.
So the ideal thing for me would be that your content is available for both. Vim is not going away, but it's annoying that a lot of Vim content is being "polluted" by Neovim stuff.
If you provide both version, people can choose their favorite.
Also, it would be interesting to see which side it most popular.