Every time I went to study something, my parents always were there drilling my head "why did you read this stuff, go read the X book, it was written couple decades ago and thus is tested, reliable and best to learn from, drop this modern junk written by fools that have no idea what they're talking about." (Note: and oversimplification of what they were really saying to better transfer their point of view across).
I've found this view again and again all over the place from various people - old textbooks are better than the new ones because they were written by more respectable people. That 1965 encyclopedia tome on the bookshelf is infinitely better than this yours "wackypodia" because the book was written, reviewed and published by an institution, and not "some random anonymous dipshit from the Internet".
This book on learning how to draw is shit, you better go get the actually good copy of anatomy for artists from 1950s.
But I often find myself disagreeing on all of these statements.
Old encyclopedias ruling because they were edited and reviewed? Rubbish with short generalizing articles (many of them being shorter than a tweet) that sometimes omit some information or even outright censored by the state or heavily biased in certain aspects (soviet ones for example), they define computer as "expensive scientific tool used to perform complex calculations", have no article on what's a modem or HIV is, and homosexuality is defined as a mental illness.
Old scientific theories being better than new ones? The most ridiculous claims that I've heard, they're either outdated or just plain wrong by modern day's discoveries.
Old anatomy books being the critical step in being good at drawing? Maybe they were written by titans of artistic fields and absolute masters of the brush, but I find modern books on same topic being incredibly asier to digest: there's informative and VERY useful generalizations, easier to follow language, more structured and defined study of the human anatomy rather than just a hyper-realistic ecorche rendering of a human forearm with all the muscles marked and insistence that in order to be good at drawing it is VITAL for you to memorize ALL of these latin names.
History... Well, let's not touch that, since it is a bit of a radioactive pile of mess. On one hand there's stuff like "actually, everything you thought you knew about the middle ages is a lie invented either during Renaissance or Victorian eras", on the other hand we have the "actually, the USA had singlehandedly won the second World War and Soviets did nothing in it except pillaged and raped the innocents because that's what russians do" modern "improvements".
On a tangential thought, I also remember our history textbooks from the school days: out of the six books for six grades, information about anything that had happen after 1940s span just few chapters at the end of sixth book, almost an afterthought, all the while theme of the ancient Greece and Egypt took the entirety of the first textbook, if not more. Despite arguably modern history should be more relevant and important to teach and know in detail than some Macedonia shenanigans from over two thousand years ago.
In general I caught myself on thinking that any modern take on something is going to be inherently better and more refined than the old one, with the only exception to that rule being the computer software. New Photoshop is an ugly mess and nothing will ever be better than the ol' trusty and simple glorious CS3 version. =P
So in general rule of thumb it's far more advantageous to search for some modern textbook on a subject, rather than dig up a dusty tome published in the 80s.
What do you think?