[kzrdude]

There's just a lot more innovation and development in the offshoot projects than in the big projects. The main project is gradually agreeing on /some/ default key bindings for lsps, as seen in this release (core does a great job on neovim no offense meant there.)

In the same time, LazyVim and AstroNvim have built whole worlds of configuration and LSP integration because they are free to tinker, at a speed far outpacing core neovim. Because the core project wants/needs to cater to everyone. Even you said it was a straight upgrade (to Vim, I assume) and just keeping it that way is not easy.