Animations far predate such loading tricks. They provide a sense of spatialisation and context. e.g minimising a window with an animation (such as the Genie ef

Animations far predate such loading tricks. They provide a sense of spatialisation and context. e.g minimising a window with an animation (such as the Genie effect, but even earlier, cruder ones) helps in understanding where it went and finding it back instead of having it just vanish. Over time the user builds a model of how it operates by observing such cues. To an advanced user it makes no sense because one already understands that, so the animation becomes an inconvenient delay. Some animations though, are just there for the heck of it, and don’t help (or even confuse) the user. They’re like the high contrast demo mode on TV, aside for being perceptually satisfying, they carry no meaning, and are actively revolting by their cognitive dissonance to users that already have a understanding of interaction models, but you’d be hard pressed to explain that to users that don’t have that understanding.