Vim is one of the most successful open-source software programs of all time. It's been going strong for over two decades.
Neovim aims to replace it, but it is not a new generation of vim, it is a new and completely different project by different people, that may or may not succeed.
I wish them the best of luck, but it is by no means clear that Neovim will ever achieve close to the user base that vim has today.
There is a difference between neovim favoring lua, and vim still existing. Plus their official stance is that vimscript is a worthy language for it's job and support for it isn't going anywhere.