Were not even close to running out of human generated data. The reason it seems this way is because it's so hard to find old data. There are tons of whole magazine scans on some obscure website that's not even indexed. Most of this is the fault of Google who has been an atrocious steward of search. Why is it that I still can't do full text search of the internet archive dataset? Forever copyright of commercially de minimus works also plays a large role.
There's a monumental amount of quality data out there that's not indexed, not searchable, and abandoned but unused. We just need to value it enough to use it.
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