I had a look at your latest viewer project, but I missed the high level problem this is solving. i.e. what is the real world use case you had that made you inve

I had a look at your latest viewer project, but I missed the high level problem this is solving. i.e. what is the real world use case you had that made you invent this library. Reading "This allows you to go back in time and render values you'll calculate later into your templates." did not help me understand the use case. By providing the real world use case, you'll have people that can relate their own use cases. Thanks!