Almost all old links to posts are broken. Actually these did not convert to the new url assigned to old posts.
As an example see this page:
Bake a Pi
All following links on this are broken, and take to “Oops! That page doesn’t exist or is private.”
If you scroll down, you will find all these post below one after the other
OPTION-1
OPTION-2
OPTION-3
ADDITIONAL DATA FEEDERS