14 year Emacs user.
1. Fuzzy command completion like Emacs helm-M-x
2. Remote shell integration that is better than Emacs TRAMP.
3. Works more reliably than Emacs.
4. LSP support.
5. Works on Mac, Windows, Linux.
6. Can cajole coworkers into using it and thus have deeply integrated tooling in our workflow that applies to everyone.
Things I miss: 1. Org mode (particularly org-capture)
2. eval-region
3. helm-sloop