I do have a few applications that I need many times throughout the day but usually only for a very short time. One of the prime examples for this is my password manager. Others are a go to terminal or some note taking application. You might have some other needs like a messenger or who knows what.
Ever wondered how to automatically lock your screen when you put your laptop to sleep? Like me you most likely found a SystemD unit file looking a lot like the one below. What annoyed me though was that the lock command would be executed after the system reached the sleep target, ergo when waking up. This resulted in a brief flicker where my screen was visible before i3lock kicked in.