Earlier quoted context omitted.
Another question to help me better understand the tool: who do you see as your competitors, technically? What do you see as viable alternatives to Noms, but worse? (Or better!) I do see that you were inspired by git, but clearly your use-cases are different.
Git is a competitor. It is fairly common to check data (e.g., csv or json files) into Git today. However, this falls down pretty rapidly. In order to get reasonable diffs, the data has to be sorted, and line-oriented. Also Git just doesn't scale well to larger repos or individual objects. Otherwise, we see the competitors as the way that people distribute data today - custom APIs, zip files full of CSV, etc.
From my quick inspection, it looks like Noms shows some focus towards working in multiple branches, whereas Datomic, at least in its marketing materials, just talks about preserving a single timeline.