There's still indexing, linting and code analysis tools running as well as multiple Docker containers (those are pretty much idle outside of running tests or migrations to be fair) and whatever else it could be doing in the background.

I spend 95% of the time with just PHPStorm and other stuff like the terminal, slack and ticketing open. And the browser of course (safari). Xcode and Android Studio are rarely opened. Mostly when I want to test out something in the apps that isn't on testflight / firebase yet.