I'm not sure that I've phrased this question well, or that I even know how to ask this question well.
Once upon a time, I looked at the web as akin to an igneous rock, whereas now I think of it as a sedimentary rock.
The web has changed a lot in the last ~5 years. Sure, it can withstand a nuclear blast or whatever it was designed to withstand, but it clearly wasn't designed to have usage patterns designed to endure.
For me, the thing that really drove this point home was a (possibly fake, possibly a joke) business card I once saw online. I don't specifically remember where I saw it, but I remember it was like a name and then where the title would typically go, it said "bounty hunter, soldier of fortune," and other dubious jobs. When I saw it, I thought it was hilarious. However, when I tried to find it again years later, I could not.
That experience got me to thinking that the primary usage pattern I had come to expect was not prevalent. Moreover, I remember having to cite sources in school papers by listing URLs, and I was never also taught that those links are transient -- that was something I learned via living.
Obviously, a public school college professor is not like a magic oracle that knows all the right answers and how the future unfolds, I get that. This all just gets me to thinking about the ephemerality of knowledge. I remember being very enthusiastic about Google once upon a time. I saw a Google video where someone from there said Google's mission was to make all human knowledge universally accessible. I was like majorly seduced by that. Now ~20 years later, the web -- you know: the one Google owns ๐ -- is like a maze of ads. That isn't really what I had in mind when I heard "all human knowledge."
Anyway, I mention all of this because my first impression was that humans sought to record what was known so as to build upon that. Now, my impression is that the digital commons got turned into forum of captive buyers without the language used ever changing, so it's a shift that's difficult to detect.
The internet is made up of all sorts of disparate connected actors. If you need information management, then it's up to you to bookmark, screenshot, or even take a web archive of important sources because a web server is ephemeral. There are services that attempt to do this, but they are one server bill or legal challenge or hacking incident away from disappearing.
But just like you didn't painstakingly preserve your collection of funny business card pictures because, really, who cares, neither did anyone else. I'd say about 90% of my oeuvre has been lost to the landfill of dead internet (any in many cases, rightfully so). That's my own writing, which I at least have some interest in. I've ready some funny posts in my life, but I didn't archive them just in case I wanted to experience the joke again.
So your original question โ Is the www using a good information mgmt strategy? โ presupposes there is any overarching strategy. There is not. There are places like Google and Amazon which have massive amounts of data redundantly stored throughout the cloud. And there are places like my little webapp I'm running on my Raspberry Pi that has no redundancy, no backup, and at some point a component will die and that will be the end of it.
Should there be? No. That would place the internet under control of one authority, and I'm pretty certain there is no one except authoritarians who thinks that would be acceptable.