As an ergo keyboard idiot, what are the advantages of the concave key well? I've seen more people using it recently, but have no idea what the advantage of that is.
Concave key wells make the keys easier to reach and decreases the amount of finger/wrist travel. Key wells combined with the ability to adjust angle/tilt using tenting legs keeps your fingers and wrists in a more neutral position while typing. This helps reduce the amount of repetitive stress on your muscles/nerves/tendons/joints