[noam87]

If data isn't embarrassingly cheap before mid-century we did something terribly wrong. Ditto electricity / battery life by the end of century.

(and again: content-addressing could drastically reduce data usage anyway.)

[ketzu]

If I understand correctly, the argument isn't against content addressing but against sharing the content with anyone. While you have an incentive to store it locally and reach for that first, you (currently) have a negative incentive (=cost of data/electricity) to share it with someone.