I'll set your less civil commentary to one side and simply ask this:
In what programming language could Emacs possibly not be feasible option for a seasoned Emacs user?
Re:Go 1.6 is Released
by tokenizerrr on Thursday February 18, 2016 @05:26AM
(#11124820)
Anything that there aren't plugins for. Same as for Netbeans, Eclipse, IntelliJ, and yes, even notepad. They're all just glorified text editors with plugin/scripting support.
There is an enormous amount of stuff that "conventional" IDEs to and emacs does not do.
Consider NetBeans: there are a lot of people that use the NetBeans platform to create stuff that have nothing to do with programming, the very same way emacs users create modes that have nothing to do with programming: https://platform.netbeans.org/screenshots.html
Seriously guys, grow the fk up.