[littleroot]

> But the impression the community gives is very much that you can always rollback and everything is in its own sandbox

I've never got that impression from the community, since day one I have the impression that it's rollbackable in a revision-control way instead of sandbox-like. The dependencies are actually global instead of sandboxed, Nix just makes it explicit which exact instance of which depends on which exact instance of which. That's not sandboxing at all.

Well to be honest it's actual only occurred to me that you could have that sandboxing impression after reading your comments and yeah I can understand you point.