I gave up on emacs and vim. Its like fighting bad design. Im long time users of both, but no plugins sufficiently provide a quality integrated experience with AI, MCP and agents. Emacs and neovim AFAIK are not designed for streaming. And with what each of them do, you can just build an IDE yourself (Claude Code). I combined with Vim bindings, spacemacs interface and built an IDE from scratch in one week with Rust. Its my daily drivers. This is true customization.