Earlier quoted context omitted.
Neovim is Vim for me and many other users. Vim is irrelevant to me now. The community is rallying behind Neovim and it shows great potential. It just needs to be bundled by major distros so it can be installed on servers with 1 command and that'll be the end of old Vim. Bram has done a tremendous job with Vim but it's time to move on to the Vim of the future.
I've never touched neovim as I'm perfectly happy with vim - what reasons are there for me to consider making the switch? I would guess neovim isn't even on the radar of most vim users. I don't see neovim surpassing vim any time soon, personally.
There are numerous improvements and features but I'll not talk about them. It has the momentum. Hundreds of developers are contributing to it. That should be the biggest reason to switch as it directly means Neovim will be much healthier than Vim which lacks the momentum.
If you want to know more about what exactly Neovim is doing on the technical side, I suggest you read up the 7 newsletters [0] since the inception of Neovim.