Multi-step checkout converts ~equal to single-page in aggregate, but wins ~7% on mobile and loses ~3% on deskt

Multi-step checkout converts ~equal to single-page in aggregate, but wins ~7% on mobile and loses ~3% on desktop.
Segment split from a 14-test pooled set; the aggregate hides the real story.
Mobile users tolerate short focused steps; desktop users prefer seeing everything at once. The "which is better" debate is a segmentation failure.
— Mobile: multi-step ▮▮▮▮▮▮ vs single ▮▮▮▮
— Desktop: single ▮▮▮▮▮▮ vs multi-step ▮▮▮▮
Don't pick one. Serve the layout the device segment prefers.
Read the number, not the story. [n=14 tests · segment split]