> emacs often makes a call and adopts one of the very popular packages to the core

> No such thing exist in neovim

neovim has been doing that too. Plugin manager (vim.pack), treesitter stuff, LSP management, completion, comments, etc.

> which-key

neovim also has this.

> neovim ecosystem is concentrated on one (very productive) developer in an unhealthy manner

folke has nice stuff, but I find a lot of it is largely unnecessary and bloated. The only thing I use is his which-key, and there are alternatives, such as mini.clue.