I don't see ostree promote themselves as an alternative to Nix. The GP linked to an explainer of how OStree differs from a bunch of systems, not really a promot

I don't see ostree promote themselves as an alternative to Nix. The GP linked to an explainer of how OStree differs from a bunch of systems, not really a promotional page. And in general OStree's use case is different to Nix so I don't think it competes. You may be right that this is a pattern, but I don't see it in this case.