I've been using atom exclusively for the last 3 months after having used IntelliJ for years. I would say yes, it is good enough, but understand that batteries are not included. You need to configure it to suit your needs.

I will say it sucks compared to vim for large files. Maybe that's due to my plugins.

But if it doesn't work for you don't use it. Webstorm offers a lot more out of the box. Or just learn Vim