My wife and I own the copyright to our wedding photos taken over 25 years ago and have the negatives. Nearly all of the photographers we talked to at the time were still in the old model where they owned the copyright -- especially the older ones. The younger ones were beginning to switch to the new model where the customer owns the copyright.
There are still numerous photographers that stick to the old model because they think it makes them more money. Kind of an interesting belief given the number of people who never have more prints made. Seems to me that you'd make more money just by charging extra for the negatives or digital files.