Thought wow cool! Quick flashlight! Instead the flashlight would frequently turn itself on while in my pocket.
And on the flip side; when I wanted the flashlight to come on the phone frequently wouldn’t recognize my tapping.
It just ended up being quicker and more convenient to turn on the flashlight from the lock screen.
Back when I ran LineageOS it was easy to commandeer a physical button and repurpose it for this. It is still difficult to do so under stock OS? (Note I'm already using double tap of the power button to activate the camera)
Eg. It was frustrating how for the longest time Samsung wouldn't let you repurpose the Bixby button.
That way when a website blinds me at night because they didn't implement dark mode, I do a quick triple-tap and magic-presto, poor man's dark mode! And after I close it, another triple-tap to go back to normal.
I'm really just waiting for the OS and browser to do "fake dark mode" whenever it detects something with a white/light background. Seems like it's about time.