I agree, the information is dated. It's the little mini-essays celebrating the philosophy of thrift, frugal living, and wise money management that are timeless -- and delightfully well written.
It's curious to track these same ideas as they keep percolating up through the excess. And not only the ancients of a hundred or a thousand years ago. Charles Long, Ernie Zelinski, and the "Your Money Or Your Life" folks. And online, Pete Adeney (a.k.a. MrMoneyMustache.com) et al.
Actually, it would be cool to see/hear Paul Wheaton and Pete Adeney shooting the sh-- and comparing notes over a couple of top-shelf pints. There is so much crossover it's insane, and yet their approaches are completely different. And they're both software engineers, hacking The System. Hmmm...
My previous laptop never exploded like that. Read this tiny ad while I sweep up the shards.