The release notes cover a period of almost two decades. A period in which MonetDB has grown in functionality and maturity. Experimental code, such as 'stream', 'BAM/SAM' has been moved to the attic or outsourced to one of the original developer, e.g. 'XQuery'.
In this respect, the release notes are merely a condensed archive on the issues addressed over all these years. The attic is included in the software repository, so you can always dive into those areas upon need.
Some of the material is not available anymore for direct access, e.g. MonetDB version 4 and XQuery. The corresponsing links have been removed. MonetDB was hosted at Sourceforge until 2008.