Comment by MereInterest

> apps built with it can be fast (e.g. VSCode, Github desktop client, Discord)

I can't speak to the other two, but there is no way I would describe Discord's client as "fast". Starting the application takes 8-10 seconds during which it pops up several different windows on top. Switching between channels has a delay of about 1 second or so. If that channel isn't in cache, then it adds another 3-6 seconds of delay.

Switching between views isn't a new task, and isn't an infrequent one. If I think back to pidgin 20 years ago, the startup time was much faster, and switching between tabs had no perceptible delay. Discord has the advantage of 6 years of Dennard scaling followed by another 14 years of Moore's Law, so it has zero excuse for not being able to perform those same tasks to the same standard.