Is that true from a user's perspective? The average user I know would not have the idea that Slack is somehow inherently worse than say MS Word or any other truly native app they use everyday. What would Slack gain by integrating better with my Mac?
Slack starts up too fast for me to read the little quotation (penultimate Macbook Pro). I actually wish it was slightly slower because I like those cheesy quotes when I can catch them. Everything feels almost instant. Not bash instant, but as fast as any mainstream messaging app.
I leave it running all the time and get what feels like normal full hours upon hours of battery life. There are apps or browser tabs that I've noticed destroying battery life, but Slack nor Atom nor MS Visual code are on that list for me.
The anti-Electron complaints all kind of feel like the same argument that comes up as each new layer of abstraction gains acceptance. I'm sure there's a lot that Electron can and should improve. Running multiple copies of Chrome does sound awful, but until I read that I didn't know the atrocities it was committing.
Just doesn't feel productive to try to make Electron go away vs. working to improve it or create a better cross-platform abstraction.