I still use both, with a shared vimrc. The biggest advantage of neovim for me is support for the clipboard in Wayland.[1] There are workarounds for vim (vim-fakeclip[2] is the best I found) but they have many limitations which can be frustrating.

[1]: https://github.com/vim/vim/issues/5157

[2]: https://github.com/kana/vim-fakeclip