This is really cool! I've always wanted to use a Rio-like WM but my chronic lack of gumption kept me from installing one. Wio looks sufficiently neat that I think I should get around to trying it.

For people who like new window manager things and also Rio, it's worth also checking out this piece of the Arcan Project: https://arcan-fe.com/2017/04/17/one-night-in-rio-vacation-ph...