Expand on the comparison page against Nix

It feels a little light on details. Given the extreme similarity between the language semantics, I'm curious what the motivation for creating jsonnet was in the first place. Was it a syntactic thing, aiming to be a superset of JSON, or were there other reasons? I see the OO stuff cited, but it's also not particularly hard to embed those semantics in a lazy language like Nix or jsonnet.

More than an answer on this ticket, I'd appreciate seeing the reasons expanded upon in the comparisons page (for posterity), although I certainly wouldn't object to both.