* TRAMP for remote editing. It's more powerful than Vim's netrw remote editing capabilites and can handle root-owned files on remote servers. It's so extensible there's even a package that allows you to edit files inside Docker containers running on remote servers.

* Dired. It's the best text-based file manager out there IMHO, and it integrates very nicely with TRAMP.

* Org mode. It can be used like Jupyter notebook, but is far more powerful. You can write each code block in any language you choose, pass data between them, and make each of them run on different servers. This is very useful for sysadmin tasks especially in professional environments because it allows you to document each step in a reproducible manner as you're executing it. You can then just share the org document for your cowokers to review.

I personally use Vim for coding and Emacs for non-trivial sysadmin tasks.