Maybe it's just my laptops (MacBook Air and Pro). But every time I open it, it's always "updating" (plugins?) before I can use it. Opening it in the browser is much faster.
Desktop apps are in the best place to silently download and install updates. This can be with a schedule via OS, or some background service that is always running even if the main application isn't.
This has worked very well for Chrome for a very long time, the only time it doesn't is for people like me that restart the computer only every couple of weeks.
Discord could have a similar model but choose not to for some reason.