An official blog can be, "This is how it is done, as of the time of posting." However, then you end up with blog posts like, "here what's new in 3.5", without

An official blog can be, "This is how it is done, as of the time of posting." However, then you end up with blog posts like, "here what's new in 3.5", without any documentation for users who never used 3.4 (or 3.3, 3.2...)