Earlier quoted context omitted.
Atom and VS Code are both built on Electron. No need to kill Atom as it and VS Code are built for different purposes.
What different purposes? They're both text editors / lightweight IDEs focusing on plugin extensibility built on top of Electron. They're literally the same thing.
Atom is extensible to a fault. A plugin can do just about everything and anything. FFS tabs are actually a plugin! While that means that performance will suffer, many (myself included) use Atom because of that insane freedom that plugins have to do what they need to do.
VSCode on the other hand is much more "if you want to do X, use this API". It's much more controlled, much more opinionated about how things "should" be done using VSCode as a platform.
From 30,000 ft, they are the same. But their goals and details differ, and I always prefer more choice rather than less.