How can I switch among application windows using [Cmd/Opt + 1/2/3...](https://askubuntu.com/questions/813262/which-desktop-environments-allow-switching-among-windows-with-supernumbers) etc, like on Unity or KDE?

## Reasoning

This is especially handy if you often switch among the same few apps, e.g. a browser, a file manager and an IDE, but also have other apps open, so Alt+Tabbing to the desired window would take more time.<sup>1</sup>

That keyboard shortcut saves me probably 5 seconds per minute on the average, so ~40 minutes a day, and it's supported by Windows as well.