I believe this is implying that developers take Atom (and other Electron apps) working fine on their computer and believe Electron app products they build will

I believe this is implying that developers take Atom (and other Electron apps) working fine on their computer and believe Electron app products they build will also work fine on any computer their end user may be using. So that particular line doesn't apply to the original "which editor is faster" article, but it does apply to the context of this article.