As someone who uses (and prefers) MIPS screen to AMOLED, here are a few reasons I went that route: A) User experience: I prefer watches to be tools that do a job, and otherwise to mostly get out of my way. MIPS serves that function well, and is similar to old school LCD displays in that regard. I find illuminated displays to be distracting and draw attention, especially after dark. In these days, where light up screens are pervasive, MIPS provides a more zen experience. It’s “always-on” when I need to view it, but otherwise gets out of my way. B) Functionality: I use my watch to track daily workouts, and I’m about to go on a multi-day backpacking trek where a Garmin Fenix will be primary GPS device (phone/maps/compass secondary). Being able to view the screen and use maps without excess power drain is more useful for me. I prefer my watch to be a functional tool, and not just an extension of my smartphone. I don’t need a pretty light up screen. Battery life is not just about reducing charging frequency, but also reliability in the backcountry and on long workouts. Which leads to… C) Longevity: longer battery life = less charging cycles = longer device life. I don’t feel like replacing an expensive device every year or two. MIPS screens are also more durable than AMOLED. I have friends that are using 5+ year old Fenix watches to track daily runs.