IMO it is not that surprising that neovim has had some success, in the same way that isn't that surprising that SwayWM has had some success. They both have the benefit of, in many cases, being completely compatible with the tool they want to replace, but being compatible with a popular new technology (LSP or wayland).

My vimrc already has a bunch of configuration in it, I'll give Helix a try when it is able to parse that (so, probably never, I guess).