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.
I'm not arguing that there are no good reasons to try Neovim. I just don't see any logic in your argument. You speak about loosely defined "health" and "momentum" as if there was a clear link between software quality and amount of buzz around the project.
It's not like Neovim (or any open source project) is an open house where anyone can come, throw some code over the wall and get it merged. Like any big project (Vim included), it is being maintained by a set of core responsible developers who know better. Neovim has a huge focus on automated tests and CI also. I don't see any reason why a big contributor base should make the end product worse.
> I just don't see any logic in your argument. You speak about loosely defined "health" and "momentum" as if there was a clear link between software quality and amount of buzz around the project.
Of course there is. Look at Linux, ReactJS, Docker, Kubernetes, Ubuntu, Firefox. The more momentum a project has, the more contributions it gets. Open source projects succeed because of the community around them.
GNU Hurd was not able to gather momentum and look where it is today. Contributors flocked to Linux so it flourished.
that's not disputed. the question is, what specific impacts do these contributions have on me, the user? why should i, a user of vim, switch to neovim?