Well I'm f'n shocked. After wrestling with Atom bugs and performance issues (on macOS) for such a long time, I finally gave up and looked around for another editor. Tried out Visual Studio Code.
WOW! It's so-o-o-o much faster than Atom with a ton of UX improvements. Feels like Atom in the ways that matter, but definitely improves upon it. It's funny that Atom and VS Code are now both under the MS umbrella…I've heard Atom may fade away because of this.
Anyway, I'm a happy camper. 😃