Your point is correct for entertainment apps like video games. Last decade doesn't look like video games golden age though :( The rest of the apps - the less s

Your point is correct for entertainment apps like video games. Last decade doesn't look like video games golden age though :( The rest of the apps - the less screen time they get, the better they're. I don't want to be "immersed" in Spotify. I want to find music I want and be done with it. There's little to help UI design in data. Best way is watching your users (or at least using eye-tracker) and then talking to them. Looking at cold data, you never know why somebody took that long at certain step or kept clicking around. Why did they click wrong button - is it wrong color/positioning, unclear label or they just changed their mind? It's hard to know when users are annoyed or when it's stressful for them either. Meanwhile data is great if you want to do shoot-in-the-dark A/B testing. Which is good to optimise for "more links clicked". But not so much for relaxed user happily doing his task in quickest way possible.