I guess the question becomes: what is the native ecosystem missing that means devs are choosing to deliver memory/CPU hungry apps, rather than small efficient ones?
If there was some modern tool like WxWidgets that supported modern apis like DOM, Android and UWP, would we see more use of native? Electron would therefore become pointless.
The hypothetical business has two choices. Choose Electron, or choose some other toolkit that has native, cross-platform support (like Qt). It's far easier for the business, and the developers there, to take their existing website HTML, CSS, and Javascript; and simply wrap it in Electron (which costs $0), and call it a day. Every other choice is (perceived as being) more expensive.
Qt is a modern toolkit with native-cross platform support, but costs money for commercial use, and businesses and software developers don't want to spend the money on it.
Not to mention, the HTML/CSS combo is possibly the best we've come up with for designing user interfaces.