Apple Is Trying to Kill Web Technology

Rejecting Electron apps has nothing to do with Apple trying to kill web technologies. Just because Electron apps are developed using technologies meant for the web does not mean they are web apps. This would not be an issue if Electron itself did not use private API.

total load of FUD.

you prevent apps from using private APIs because those APIs aren't guaranteed be around tomorrow and you don't want to have to maintain internal mechanisms that aren't stable or robust enough to have outsiders relying on them.

It has nothing to do with web technologies. They do it for ANY app that uses private APIs, and as a user I thank them for it. You wanna use private APIs? don't use the app store and cross your fingers that your app won't break with every single system update.