The most annoying question, that has been asked many times through centuries.. here it goes again:

What Editor would you choose for Web, React.js, React Native and Flutter on Mac:

Atom || VSCode

Vscode

Atom is just slow

use Web storm

@NoMad Another vote for sublime

Can't say much but I've used atom and vscode.
Atom is yet unable to provide integrated terminal for command prompt in Windows. Linux has one.
I prefer atom because of its nicer looks and extended extension repository.
I might have liked vscode if i weren't already using visual studio for cpp.
Working with Atom lets me enjoy a different look & feel. Though i had to buy an ssd for it as it was slow on HDD.

I was big atom fan, but now prefer vscode

Vscode by a large margin.

vs code