Discord doesn't, it's Electron too. That's not the root of the problem. Discord is pretty fast, I haven't really noticed it "chugging" and lagging like MSTeams does.
My problem with Discord is that I can't tell if it just poor UX or if it performance issues as well. Horrible app, I only use it cause I am kinda forced to keep up to some things going on there. Not unusual that you miss out on things even when you think you done everything to get notified. I don't even understand how the crap is supposed to work to be honest. Seems utterly broken. Fast of what? I can't understand wtf it is showing half of the time.
Edit: HN surprises, comments that can't be replied. Anyways. To stay up to date in the biz is hard enough. No need to add random Gremlins to that. Like not following basic UX rules.