Sooooooo computers are fast now. we don't have to miserly conserve every single bit and cycle.
Monospace font is required because "i" and "m" are differently wide, and because computers were slow, rendering text to the screen was hard. We don't live in that world anymire though. TLS protects every action you take on the web with a giant pile of math that would make the first computers choke.
Kwi seems to follow in those footsteps and continue this abuse of typography and beauty.