LiquidZero said "additional data storage becomes an issue with even incremental micro transactions involving millions of users lifelong history..." Not buying it... plenty of services provide millions of bits of data every day for their users-and they keep the history available for months and years... I personally wouldn't trust a bank or phone company or Amazon order history page that couldn't do this (for examples).  Unfortunately, I think the difference between You Tube's willingness to do this for years of history on gazillions of free accounts and Pandora's lack of this feature boils down to one word: royalties.  Hate to sound cynical, but as other users have pointed out listening history used to be a feature on Pandora- I remember when it was available for 30 days.  Amazon Prime videos also used to provide this specific feature, but it disappeared several years ago. Their business model also involves paying out ...royalties ...just sayin' ... View more

Not quite buying this answer as YouTube is able to easily show a list of every video I've even partially watched (even ones I click on by accident) , and they've figured out a way to keep track of that info and make it available to each enduser.... ... View more