Funny, my desktop itself is already written in JS, and supports/integrates with apps written that way, too, (and also that aren't), and that's been the case for a while now. And the same has been true of apps from the Mozilla platform lineage for even longer; Firefox has been an Electron-style app for 100+% of its lifetime, for example. Talk to any self-styled JS programmer for any length of time, though, and it's like these things don't even exist—like the latter was actually invented by the Electron folks, and the only thing that made JS development viable generally as a serious applications programming language is the trio of NPM+Webpack+React/React-alikes.
It's overall not worth taking their opinions at face value. They tend to be the ones who are "not following JS". They're worshipping some weird toolchain cult and calling it JS. Indeed, judging by the compulsion to try to work around ostensible deficiencies in the language and deal in cargo cult advice (esp. e.g. concerning things like `==`/`===` and `this`, and insisting on NodeJS-isms like its non-standard `requires`) it's evident that they actually hate JS, despite what they're likely to say to the contrary.