Have you ever wondered where to find release notes of older releases?
I faced a similar inquiry recently, and it transpired to be relatively straightforward. The release notes’ URL structure has remained consistent throughout the years:
https://system.netsuite.com/app/help/helpcenter.nl?fid=ReleaseNotes_<YYYY>.<number>.0.pdf
Replacing the <YYYY> placeholder with the target year e.g. 2023, and <number> with 1 or 2 does the trick, at least up to the 2013.2 Release. However, I was unable to find any beyond that.