I don't personally develop anything using Electron. But given it's popularity as a way to build desktop apps, it seems reasonable that people are concerned even though they haven't also blocked QT or React
I think the concern should be on why the electron devs found it appropriate to use a private API, which is against App Store guidelines, risking/preparing rejection for any app using their framework.
The rejection of private keys used, by frameworks, is in no way new (2009 [1]) or misunderstood.
I find it very difficult to understand why Apple is getting any blame/concern for enforcing the violation of a very very old requirement.
> The reason this has become news recently is the creator of a framework used by several apps used a private API, so when developers who included his framework updated their apps, they were rejected