The sales story
3DS did not begin like a runaway success. Its launch exposed a gap between Nintendo's expectations and the market's willingness to pay for the hardware in its first form. The recovery happened because Nintendo responded aggressively, most famously through a major price cut, and then rebuilt momentum with software that reminded buyers why Nintendo handheld ecosystems had been so resilient for so long.
The platform never repeated the DS miracle, but it did prove that a dedicated handheld could still hold a serious audience in the era of smartphone expansion.