Stepmania in Steam.

Srsly, why not? IMHO, it's great idea...

Because you hav to pay to insert a game on Steam.
I mean
One hundred dollars to be able to use the Greenlight
And tons of likes in the greenlght page
Don't you think it's hard?


However, I don't decide this, it's also my opinion.

I wouldn't be comfortable putting StepMania on Steam without more licensed content and a new (more user-friendly) theme.

Well... there is one like it (maybe based of SM5) at this moment it is on Early Access Game with kind of hefty price cost...

Called: Pulsen

http://store.steampowered.com/app/340960/