I would like to see this applied to other language environments to lower the barrier to entry. Maybe Erlang, Haskell, Racket, Ocaml.
Bozhidar Batsov's Prelude[0] is another excellent one. It's got a lot of good pre-selected choices, and almost no bad ones. I can highly recommend it.
Emacs is best thought of as a special-purpose virtual machine, a little bit like the JVM och Python VM. Maybe this will help people understand that something like Magit is not just a Git integration for Emacs users -- it is a full, standalone end-user Git interface that just happens to be written for the Emacs VM.
I'm not too keen on oackaging the VM with an application for easy deployment, but I do hope it helps people view Emacs modes as not just "an X for Emacs users" but rather "an alternative X that happens to run on Emacs".
Calc is another thing a lot of people could use to great effect but don't because it runs in Emacs.
Back before Eclipse, it wasn't uncommon for emacs to be bundled into development environments. Xemacs is a famous example of this (being forked by Lucid for their dev tools). My recall is that SunWorkshop used to use emacs as the IDE frontend back in the 90s. Allegro Common Lisp also used to include it.
I think I came across other examples, but currently Google isn't providing enough help to 20 year old memories.
I've spent a long time going back and forth between Atom/VSCode (too slow on my machine) and [neo]vim (where language integration/autocomplete/file tree/etc. still feel like bolted-on hacks). The I discovered doom-emacs. It's the best of all three worlds: the speed and power of Emacs, the modal editing agility of Vim, the beautiful UI of Atom (after some configuration).
I assume it would be non-trivial, however, just based on the experience I've had with the process so far.