There's power efficiency reasons to prefer a more modern CPU. It's not that you need the speed, at all. It's the nanometer / process size. The more tightly p

There's power efficiency reasons to prefer a more modern CPU. It's not that you need the speed, at all. It's the nanometer / process size. The more tightly packed the transitors are, the shorter distance electrons have to flow and so requires less energy. This watch is more expensive, by a lot, but will also consume more battery than other current generation watches.