[levbrie]

My vote is for electron, although I'm following how React Native develops really closely. From what I've seen, the best new "Desktop" apps tend to be built with electron. We've been using it in production and, despite having to make pull requests for framework-level bugs fairly regularly, we've haad a pretty good experience overall, and far better than anything else we've tried - although, as I said, we have yet to seriously look into React Native. Also, by cross-platform I'm assuming you mean OS X, Windows, and Linux. If you also want to include mobile, then there are so few options there's no longer any real reason to debate.