Yes, we agree that a lot of the value comes from the huge standard library. That's why we try to implement as much of it as possible. Right now we support more than 900 functions. All the Data functions will be a little more complicated of course, but they could e.g make a request to online data archives (ourworldindata.org, wikidata.org, …). So I think it's definitely doable.

We also want to provide an option for users to add their own functions to the standard library. So if they e.g. need `FinancialData[]` they could implement it themselves and provide it as a standard library function.