The Electron maintainers should've considered that possibility before reaching for a private API. It's on the Electron's team's shoulders and nobody else's.

If I were building a FOSS platform, I wouldn't give a second thought to third parties making use of my platform's private APIs. They're private for a reason, whether that be because they're not yet fully baked or because using them can have unintended consequences, they're not intended for public consumption. I especially wouldn't want somebody else's platform to depend on my private APIs, because I am then effectively locked into keeping that API frozen in time by the numerous others building on this other person's platform.

It's generally poor practice to build upon such brittle things as under-the-hood tinkering anyway.