[tln]

I like it! Another one-liner I'm constantly adding is

    const wait = ms => new Promise(resolve => setTimeout(resolve, ms))

Whatever runs the main function should probably do more, like handling rejections.

[mgreenw]

Same, I've written this so many times. Node just added this as a built-in utility FWIW

https://nodejs.org/api/timers.html#timerspromisessettimeoutd...