What controversial product design decision did Apple make with the original iPod in 2001 that was initially criticized but later became an industry standard?

The path from concept to revolutionary product often involves fascinating design decisions that might have seemed counterintuitive at the time. This poll explores a pivotal product design choice that ultimately transformed an entire industry. Test your knowledge about the intersection of technology, design thinking, and consumer psychology that led to one of the most significant product innovations of our time.

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Eliminating physical buttons in favor of the click wheel interface
Using a proprietary charging connector instead of standard USB
Making the battery non-removable by users
Offering it exclusively in white color for the first generation