For those not into the lingo, Tramp is the Emacs module/package responsible for allowing you to transparently work on remote files and host in your local editor in a way I haven’t seen any other software do.
And yes, it’s really neat.
replies(3):
And yes, it’s really neat.
Editing as another user, editing a remote file, even editing over embedded protocols like adb: Tramp's got you covered.