Don't get me wrong, I do get and appreciate the "complete package" and "customize everything" approaches followed by Emacs, but Emacs is often not the best tool for the job, if you work in a team. You've mentioned Jupyter notebooks and project management. Yes, Org and interactive modes are excellent, well-polished, full of goodies. The problem is that features like these require other people to either do the same as you do or to be able to integrate via an API/protocol. Having lots of people being fond of Emacs is a bit of a stretch, while integration features rely a lot on the community, which, as I've already said, isn't that wide, so plugins aren't always well maintained, unless you do it yourself, of course... And as a editor with LSP (a built-in) Neovim is simply put extremely responsive, I'd say it's closer to Unix philosophy of having a single thing doing its job really well.