I want user interaction to be free of race conditions. If I click on an app that takes 1 second to start, then start typing, the resulting behavior shouldn't ch

I want user interaction to be free of race conditions. If I click on an app that takes 1 second to start, then start typing, the resulting behavior shouldn't change based on whether I started typing before or after the window appears. In both cases, the input shouldn't make it to the previously focused app, and perhaps the input should even be buffered and sent to the new window once it appears (though I'm unsure if this is a good idea). And if you click back on the old window after clicking an app icon (which is slow to load), the newly opening app perhaps should not steal focus (interrupting user interaction at an unpredictable point) once it does pop up (though I'm unsure if this is an ideal user experience, how should the new app indicate its presence?).