Apple Tested Stage Manager on iPads Without M1 Chip and Wasn't Satisfied

As more post-WWDC interviews with Apple's software engineering chief Craig Federighi surface, we continue to learn more about Apple's reasoning behind iPadOS's new Stage Manager feature being limited to iPads with the M1 chip.
The latest interview was published by Forbes contributor David Phelan, who asked Federighi if Apple attempted to make Stage Manager work with iPad models without the M1 chip. In response, Federighi said Apple did some early testing of the feature on other iPads, but Apple