There is no reason to me that cube won't be utilizing the entire extent of netrunner collections. Remaining faithful to magic cubes that inspired us.
However, I do think that a cube that is buildable from only currently legal cards is important so that players getting into the game have something to build. Should these players love cube as much as we do. I will do my best to maintain a cube like this but expect less updates from that cube(likely every several packs instead of every other pack like I've been doing with SH cube).
Expect an update to SH cube sometime within the next week, a final version going into worlds so that people can have it all built if they choose to bring it.
Finally, I have a lovely side project I've been working on. A "graveyard cube". In spirit of rotation this is something to do with your excess cards(unless you already have a SH cube built).
Here is the first draft