August 25, 2026

Transitions look like decoration and are not. Each one tells the viewer something about the relationship between what they just saw and what they are seeing now.
Getting that wrong is subtle: nothing looks broken, the demo is just harder to follow than it should be.
Using one transition everywhere because it looks consistent. That flattens real differences: a cut and a scroll become the same event, and the viewer loses track of whether they are on a new page or further down the old one.
Consistency is worth having in style, not in meaning. Matching the transition to what actually happened is what makes a demo followable.
A transition long enough to notice is too long. Six hundred to eight hundred milliseconds reads as motion; anything past a second reads as waiting, and it is paid on every step.
Across twelve steps a transition half a second too slow adds six seconds of nothing to a demo already fighting for attention.
Some viewers have motion reduced at the operating-system level, and honouring that is both an accessibility requirement and simple courtesy. What matters is reducing the motion rather than removing the information.
A scroll that becomes a cut loses the fact that a scroll happened. Replace it with something static that says so instead — that is the difference between accommodating a preference and ignoring the viewer who set it.
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