In obtaining my university degree, I have read several hundred books and manuscripts up to 2500 years old. To suggest that there isn't value in reading 'old' books or books by 'old' authors, should be handled with skepticism (I'm looking at you Doug Polk). While some of the information will be dated, that doesn't mean there isn't value. There is, but understanding what the important 'stuff' is, how to interpret that information in today's game, these are the nuggets that elevate your game.
Clearly I advocate reading. While it has been several years since I read the original Super System, there is lots of great stuff to be had in there. I can only make the assumption that Doyle's new book will also offer some great stuff!
I agree to a certain extent - there can certainly be value in reading all sorts of texts, even ones that are outdated, to gain a broader perspective on an issue or to understand how people thought at a certain time.
That said, for it to be valuable I think you already need to have a solid understanding of the topic at hand: you need to
know that you're reading something that's outdated or has been superseded, and have an understanding of how it does or doesn't apply to the issue at hand.
Now like you, it's been some years since I last read the original
Super System too. It's absolutely an interesting read. But it has little if any relevance to the modern game.
For starters, it dedicates large sections to games that are almost
never played any more, including traditional five-card draw and high-low stud with no qualifier (which is significantly different strategically from the Stud8 variant that's most commonly played today). It also doesn't cover what's probably the second-most popular game today, PLO (though the sequel does IIRC)
Point is though, chances are if you're on this forum then the game you're most interested in is NLHE, played online for relatively low stakes. The NLHE section of the original
Super System, on the other hand, is concerned almost exclusively with playing live NLHE games, against relatively unsophisticated opponents, for high stakes. In fact the sheer amounts of money often at stake are mentioned by Brunson a few times as being an integral part of his strategy when it comes to putting pressure on his opponents.
Now if you, in 2017, have access to that kind of game with those kind of opponents then that's fantastic. But if you don't, and you try to apply that same strategy to a low-stakes online game, chances are you're going to get crushed.
So... is it an "interesting" read? Sure. But if you're someone with limited time and money looking to improve your low-stakes online NLHE game, then I'm suggesting there are plenty of better ways you can spend your time.
Maybe this latest book is more relevant to the modern game - I don't know, I haven't read it. But unless you're a mixed game player you'll still be shelling out for a book you only really want one section of.