What is the Niche Zero grinder and why is it popular?

The Niche Zero is a single-dose burr grinder designed specifically for home use — it grinds exactly the amount you pour in with virtually no retention (leftover coffee in the grinder path). This makes it ideal for espresso enthusiasts who switch between multiple coffees or dial in precisely by weight. It's praised for grind quality, low noise, and retention. At $600–$700, it's an investment but beloved by the home espresso community as a best-in-class daily driver.