No genuine ones. There are some extremely few ones, but they're all related to "some people use emacs and it's good for you to fit in with them" (for instance, I recall a proof assistant some years ago which was painful to use without the associated emacs mode).
Any advantage gained from the interface are small enough that they're not worth introducing another mental mode for. Any time you sit down at a keyboard and have to mentally remap ("copy works differently here", "shortcuts are different here", "that thing you do all the time must be done in a very different way here"), it's mental capacity out the window. When you do a task, you want your interface to be as similar as possible to the interfaces you're used to when doing related tasks.
Emacs could have become the common, core interface for working on a computer (unlike vi, I'd say) - but it didn't. The common user access standards that you're used to in VS, Eclipse and IDEA did. Spend your time mastering those instead, it will give far more transferable and valuable skills.
> Any time you sit down at a keyboard and have to mentally remap ("copy works differently here", "shortcuts are different here", "that thing you do all the time must be done in a very different way here"), it's mental capacity out the window.
That's true, which is why I use only Linux, only StumpWM, only emacs. Using anything else slows me down and gets in my way.
> The common user access standards that you're used to in VS, Eclipse and IDEA did. Spend your time mastering those instead, it will give far more transferable and valuable skills.
There's nothing to master, because the languages those tools offer aren't expressive enough to require any mastering. They're two steps above pointing and grunting, while emacs is poetry.
Any advantage gained from the interface are small enough that they're not worth introducing another mental mode for. Any time you sit down at a keyboard and have to mentally remap ("copy works differently here", "shortcuts are different here", "that thing you do all the time must be done in a very different way here"), it's mental capacity out the window. When you do a task, you want your interface to be as similar as possible to the interfaces you're used to when doing related tasks.
Emacs could have become the common, core interface for working on a computer (unlike vi, I'd say) - but it didn't. The common user access standards that you're used to in VS, Eclipse and IDEA did. Spend your time mastering those instead, it will give far more transferable and valuable skills.