> I've just launched the application

I'd even have a special sub-criterion under this: The application may only take focus once it is _ready to actually use_.

Slack is a prime example of how apps steal focus multiple times during startup: I start the app, cmd+tab to something else whilst I'm waiting, and it steals focus again at least 3 times before it's actually loaded and usable.

You can have focus once I can actually do something, not to show me "HEY LOOK I'VE LOADED YET ANOTHER BLOATED COMPONENT!"