There was time when Microsoft used to ship MSDN and TechNet CDs/DVDs on a monthly/quarterly basis, probably a decade ago. Loads of content, trial software, Knowledge Base, etc. And I used to wait eagerly for them because years back, at least in India, the internet speeds on dial-up used to bring tears!
And occasionally, Microsoft sent nice cases, big ones. And I have all of that preserved
This is all part of my precious collection
And sometimes, this too happens – the content still remains so useful!