Blog author here. Thats a fair criticism. I wanted to pick on Spotify and Atom more in my blog post, but both Spotify and Atom have cleaned up their act. I couldn't get either one to reproducibly use lots of CPU. Props to everyone involved in fixing that.

But I'd also argue that Flash could always be written to be efficient too. The problem with flash was never the little games people made. The problem was that one tab with a stupid punch-the-monkey banner add playing somewhere that would sit on 20% cpu even when the tab was in the background. I think Electron is similar, except in the desktop space. Well written apps seem to be able to keep CPU load down (although they still have a huge download and a huge RAM footprint). But there's been a running trend of noticing some dumb software running somewhere on my machine eating all my CPU. And in the last year or two its been an electron app, every time. Just like flash before it.